621909464 has 16 divisors (see below), whose sum is σ = 1272087720. Its totient is φ = 282686080.

The previous prime is 621909433. The next prime is 621909493. The reversal of 621909464 is 464909126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533489 + ... + 3533664.

Almost surely, 2^621909464 is an apocalyptic number.

It is an amenable number.

621909464 is an abundant number, since it is smaller than the sum of its proper divisors (650178256).

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

621909464 is a wasteful number, since it uses less digits than its factorization.

621909464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067170 (or 7067166 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 621909464 is about 24938.1126791905. The cubic root of 621909464 is about 853.5763794724.

The spelling of 621909464 in words is "six hundred twenty-one million, nine hundred nine thousand, four hundred sixty-four".