623785920 has 56 divisors (see below), whose sum is σ = 1980523344. Its totient is φ = 166342656.

The previous prime is 623785909. The next prime is 623785961. The reversal of 623785920 is 29587326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323929 + ... + 325848.

Almost surely, 2^623785920 is an apocalyptic number.

623785920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623785920 is an abundant number, since it is smaller than the sum of its proper divisors (1356737424).

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

623785920 is a wasteful number, since it uses less digits than its factorization.

623785920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649797 (or 649787 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 623785920 is about 24975.7065966110. The cubic root of 623785920 is about 854.4340017890.

The spelling of 623785920 in words is "six hundred twenty-three million, seven hundred eighty-five thousand, nine hundred twenty".