623595420 has 72 divisors (see below), whose sum is σ = 2161801824. Its totient is φ = 142535808.

The previous prime is 623595391. The next prime is 623595437. The reversal of 623595420 is 24595326.

623595420 is a `hidden beast` number, since 6 + 23 + 595 + 42 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246199 + ... + 248718.

Almost surely, 2^623595420 is an apocalyptic number.

623595420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623595420 is an abundant number, since it is smaller than the sum of its proper divisors (1538206404).

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

623595420 is a wasteful number, since it uses less digits than its factorization.

623595420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494939 (or 494934 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 623595420 is about 24971.8925994807. The cubic root of 623595420 is about 854.3470134786.

The spelling of 623595420 in words is "six hundred twenty-three million, five hundred ninety-five thousand, four hundred twenty".