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621320 = 23572317
BaseRepresentation
bin10010111101100001000
31011120021212
42113230020
5124340240
621152252
75165300
oct2275410
91146255
10621320
11394897
1225b688
13189a5b
14122600
15c4165
hex97b08

621320 has 48 divisors (see below), whose sum is σ = 1631340. Its totient is φ = 212352.

The previous prime is 621317. The next prime is 621337. The reversal of 621320 is 23126.

It can be written as a sum of positive squares in 2 ways, for example, as 550564 + 70756 = 742^2 + 266^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 621295 and 621304.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621320.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1802 + ... + 2118.

2621320 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 621320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815670).

621320 is an abundant number, since it is smaller than the sum of its proper divisors (1010020).

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

621320 is a wasteful number, since it uses less digits than its factorization.

621320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 621320 is about 788.2385425745. The cubic root of 621320 is about 85.3306612662.

Adding to 621320 its reverse (23126), we get a palindrome (644446).

The spelling of 621320 in words is "six hundred twenty-one thousand, three hundred twenty".

Divisors: 1 2 4 5 7 8 10 14 20 28 35 40 49 56 70 98 140 196 245 280 317 392 490 634 980 1268 1585 1960 2219 2536 3170 4438 6340 8876 11095 12680 15533 17752 22190 31066 44380 62132 77665 88760 124264 155330 310660 621320