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445045620 = 223537307653
BaseRepresentation
bin11010100001101…
…101101101110100
31011000102122211010
4122201231231310
51402412424440
6112054512220
714012553045
oct3241555564
91130378733
10445045620
112092423a8
12105065670
1371283906
144316c8cc
1529110580
hex1a86db74

445045620 has 96 divisors (see below), whose sum is σ = 1285941888. Its totient is φ = 114918912.

The previous prime is 445045609. The next prime is 445045621. The reversal of 445045620 is 26540544.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445045621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681214 + ... + 681866.

It is an arithmetic number, because the mean of its divisors is an integer number (13395228).

Almost surely, 2445045620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445045620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642970944).

445045620 is an abundant number, since it is smaller than the sum of its proper divisors (840896268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445045620 is a wasteful number, since it uses less digits than its factorization.

445045620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 445045620 is about 21096.1043797190. The cubic root of 445045620 is about 763.4867604532.

The spelling of 445045620 in words is "four hundred forty-five million, forty-five thousand, six hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 37 60 74 111 148 185 222 307 370 444 555 614 653 740 921 1110 1228 1306 1535 1842 1959 2220 2612 3070 3265 3684 3918 4605 6140 6530 7836 9210 9795 11359 13060 18420 19590 22718 24161 34077 39180 45436 48322 56795 68154 72483 96644 113590 120805 136308 144966 170385 200471 227180 241610 289932 340770 362415 400942 483220 601413 681540 724830 801884 1002355 1202826 1449660 2004710 2405652 3007065 4009420 6014130 7417427 12028260 14834854 22252281 29669708 37087135 44504562 74174270 89009124 111261405 148348540 222522810 445045620