639848472 has 64 divisors (see below), whose sum is σ = 1625702400. Its totient is φ = 209832960.

The previous prime is 639848467. The next prime is 639848483. The reversal of 639848472 is 274848936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443929 + ... + 445367.

It is an arithmetic number, because the mean of its divisors is an integer number (25401600).

Almost surely, 2^639848472 is an apocalyptic number.

It is an amenable number.

639848472 is an abundant number, since it is smaller than the sum of its proper divisors (985853928).

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

639848472 is a wasteful number, since it uses less digits than its factorization.

639848472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736 (or 1732 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 639848472 is about 25295.2262690018. The cubic root of 639848472 is about 861.7058587321.

The spelling of 639848472 in words is "six hundred thirty-nine million, eight hundred forty-eight thousand, four hundred seventy-two".