638160472 has 32 divisors (see below), whose sum is σ = 1206636480. Its totient is φ = 316404000.

The previous prime is 638160469. The next prime is 638160503. The reversal of 638160472 is 274061836.

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, 567703 + ... + 568825.

It is an arithmetic number, because the mean of its divisors is an integer number (37707390).

Almost surely, 2^638160472 is an apocalyptic number.

It is an amenable number.

638160472 is a deficient number, since it is larger than the sum of its proper divisors (568476008).

638160472 is a wasteful number, since it uses less digits than its factorization.

638160472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 638160472 is about 25261.8382545689. The cubic root of 638160472 is about 860.9474289192.

The spelling of 638160472 in words is "six hundred thirty-eight million, one hundred sixty thousand, four hundred seventy-two".