639190012 has 12 divisors (see below), whose sum is σ = 1144596376. Its totient is φ = 312162480.

The previous prime is 639190009. The next prime is 639190043. The reversal of 639190012 is 210091936.

639190012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1857939 + ... + 1858282.

Almost surely, 2^639190012 is an apocalyptic number.

It is an amenable number.

639190012 is a deficient number, since it is larger than the sum of its proper divisors (505406364).

639190012 is a wasteful number, since it uses less digits than its factorization.

639190012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716268 (or 3716266 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 639190012 is about 25282.2074194482. The cubic root of 639190012 is about 861.4101670643.

The spelling of 639190012 in words is "six hundred thirty-nine million, one hundred ninety thousand, twelve".