621330136 has 32 divisors (see below), whose sum is σ = 1336515840. Its totient is φ = 265265568.

The previous prime is 621330109. The next prime is 621330167. The reversal of 621330136 is 631033126.

It is a super-2 number, since 2×621330136² = 772102275803556992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 621330136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6366 + ... + 35821.

It is an arithmetic number, because the mean of its divisors is an integer number (41766120).

Almost surely, 2^621330136 is an apocalyptic number.

It is an amenable number.

621330136 is an abundant number, since it is smaller than the sum of its proper divisors (715185704).

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

621330136 is a wasteful number, since it uses less digits than its factorization.

621330136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42463 (or 42459 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 621330136 is about 24926.4946592978. The cubic root of 621330136 is about 853.3112528195.

The spelling of 621330136 in words is "six hundred twenty-one million, three hundred thirty thousand, one hundred thirty-six".