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72711730 = 2571379903
BaseRepresentation
bin1000101010101…
…11111000110010
312001211010202001
410111113320302
5122103233410
611114244214
71542016360
oct425277062
9161733661
1072711730
1138053443
122042666a
13120aabc0
14992a630
1565b433a
hex4557e32

72711730 has 32 divisors (see below), whose sum is σ = 161086464. Its totient is φ = 23011776.

The previous prime is 72711713. The next prime is 72711757. The reversal of 72711730 is 3711727.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39042 + ... + 40861.

It is an arithmetic number, because the mean of its divisors is an integer number (5033952).

Almost surely, 272711730 is an apocalyptic number.

72711730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72711730 is an abundant number, since it is smaller than the sum of its proper divisors (88374734).

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

72711730 is a wasteful number, since it uses less digits than its factorization.

72711730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79930.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 72711730 is about 8527.1173323697. The cubic root of 72711730 is about 417.3830669215.

It can be divided in two parts, 72711 and 730, that added together give a square (73441 = 2712).

The spelling of 72711730 in words is "seventy-two million, seven hundred eleven thousand, seven hundred thirty".

Divisors: 1 2 5 7 10 13 14 26 35 65 70 91 130 182 455 910 79903 159806 399515 559321 799030 1038739 1118642 2077478 2796605 5193695 5593210 7271173 10387390 14542346 36355865 72711730