639932424 has 32 divisors (see below), whose sum is σ = 1600456320. Its totient is φ = 213227456.

The previous prime is 639932417. The next prime is 639932429. The reversal of 639932424 is 424239936.

It is not an unprimeable number, because it can be changed into a prime (639932429) 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, 105457 + ... + 111359.

It is an arithmetic number, because the mean of its divisors is an integer number (50014260).

Almost surely, 2^639932424 is an apocalyptic number.

It is an amenable number.

639932424 is an abundant number, since it is smaller than the sum of its proper divisors (960523896).

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

639932424 is a wasteful number, since it uses less digits than its factorization.

639932424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10429 (or 10425 counting only the distinct ones).

The product of its digits is 279936, while the sum is 42.

The square root of 639932424 is about 25296.8856581201. The cubic root of 639932424 is about 861.7435440955.

The spelling of 639932424 in words is "six hundred thirty-nine million, nine hundred thirty-two thousand, four hundred twenty-four".