621253340 has 48 divisors (see below), whose sum is σ = 1326302208. Its totient is φ = 244401984.

The previous prime is 621253309. The next prime is 621253349. The reversal of 621253340 is 43352126.

It is a super-2 number, since 2×621253340² = 771911424922311200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621253349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435869 + ... + 437291.

It is an arithmetic number, because the mean of its divisors is an integer number (27631296).

Almost surely, 2^621253340 is an apocalyptic number.

It is an amenable number.

621253340 is an abundant number, since it is smaller than the sum of its proper divisors (705048868).

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

621253340 is a wasteful number, since it uses less digits than its factorization.

621253340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 621253340 is about 24924.9541624453. The cubic root of 621253340 is about 853.2760951327.

The spelling of 621253340 in words is "six hundred twenty-one million, two hundred fifty-three thousand, three hundred forty".