639474076 has 12 divisors (see below), whose sum is σ = 1155179200. Its totient is φ = 309422880.

The previous prime is 639474053. The next prime is 639474079. The reversal of 639474076 is 670474936.

639474076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639474079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2578401 + ... + 2578648.

Almost surely, 2^639474076 is an apocalyptic number.

It is an amenable number.

639474076 is a deficient number, since it is larger than the sum of its proper divisors (515705124).

639474076 is a wasteful number, since it uses less digits than its factorization.

639474076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157084 (or 5157082 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 639474076 is about 25287.8246593099. The cubic root of 639474076 is about 861.5377553001.

The spelling of 639474076 in words is "six hundred thirty-nine million, four hundred seventy-four thousand, seventy-six".