639410484 has 12 divisors (see below), whose sum is σ = 1491957824. Its totient is φ = 213136824.

The previous prime is 639410461. The next prime is 639410537. The reversal of 639410484 is 484014936.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×639410484² = 817691534098228512, which contains 22 as substring.

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, 26642092 + ... + 26642115.

Almost surely, 2^639410484 is an apocalyptic number.

It is an amenable number.

639410484 is an abundant number, since it is smaller than the sum of its proper divisors (852547340).

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

639410484 is a wasteful number, since it uses less digits than its factorization.

639410484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53284214 (or 53284212 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 639410484 is about 25286.5672640633. The cubic root of 639410484 is about 861.5091960371.

The spelling of 639410484 in words is "six hundred thirty-nine million, four hundred ten thousand, four hundred eighty-four".