621454432 has 24 divisors (see below), whose sum is σ = 1287883800. Its totient is φ = 294372864.

The previous prime is 621454417. The next prime is 621454433. The reversal of 621454432 is 234454126.

It is a super-2 number, since 2×621454432² = 772411222104885248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621454394 and 621454403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621454433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510457 + ... + 511672.

It is an arithmetic number, because the mean of its divisors is an integer number (53661825).

Almost surely, 2^621454432 is an apocalyptic number.

It is an amenable number.

621454432 is an abundant number, since it is smaller than the sum of its proper divisors (666429368).

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

621454432 is a wasteful number, since it uses less digits than its factorization.

621454432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022158 (or 1022150 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 621454432 is about 24928.9877853073. The cubic root of 621454432 is about 853.3681501636.

The spelling of 621454432 in words is "six hundred twenty-one million, four hundred fifty-four thousand, four hundred thirty-two".