623911920 has 40 divisors (see below), whose sum is σ = 1934127696. Its totient is φ = 166376448.

The previous prime is 623911909. The next prime is 623911927. The reversal of 623911920 is 29119326.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623911927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299577 + ... + 1300056.

Almost surely, 2^623911920 is an apocalyptic number.

623911920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623911920 is an abundant number, since it is smaller than the sum of its proper divisors (1310215776).

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

623911920 is a wasteful number, since it uses less digits than its factorization.

623911920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599649 (or 2599643 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 623911920 is about 24978.2289204019. The cubic root of 623911920 is about 854.4915276339.

The spelling of 623911920 in words is "six hundred twenty-three million, nine hundred eleven thousand, nine hundred twenty".