621490560 has 128 divisors (see below), whose sum is σ = 2003810400. Its totient is φ = 163823616.

The previous prime is 621490553. The next prime is 621490579. The reversal of 621490560 is 65094126.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×621490560² = 772501032338227200, which contains 22 as substring.

It is a congruent number.

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, 169062 + ... + 172698.

Almost surely, 2^621490560 is an apocalyptic number.

621490560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621490560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001905200).

621490560 is an abundant number, since it is smaller than the sum of its proper divisors (1382319840).

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

621490560 is a wasteful number, since it uses less digits than its factorization.

621490560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748 (or 3736 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 621490560 is about 24929.7123930462. The cubic root of 621490560 is about 853.3846865797.

The spelling of 621490560 in words is "six hundred twenty-one million, four hundred ninety thousand, five hundred sixty".