639303814 has 16 divisors (see below), whose sum is σ = 1010009088. Its totient is φ = 302894152.

The previous prime is 639303803. The next prime is 639303839. The reversal of 639303814 is 418303936.

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, 60022 + ... + 69865.

It is an arithmetic number, because the mean of its divisors is an integer number (63125568).

Almost surely, 2^639303814 is an apocalyptic number.

639303814 is a deficient number, since it is larger than the sum of its proper divisors (370705274).

639303814 is a wasteful number, since it uses less digits than its factorization.

639303814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130019.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 639303814 is about 25284.4579534543. The cubic root of 639303814 is about 861.4612861268.

The spelling of 639303814 in words is "six hundred thirty-nine million, three hundred three thousand, eight hundred fourteen".