638752 has 12 divisors (see below), whose sum is σ = 1257606. Its totient is φ = 319360.

The previous prime is 638719. The next prime is 638767. The reversal of 638752 is 257836.

638752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 404496 + 234256 = 636^2 + 484^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9949 + ... + 10012.

2⁶³⁸⁷⁵² is an apocalyptic number.

It is an amenable number.

638752 is a deficient number, since it is larger than the sum of its proper divisors (618854).

638752 is a wasteful number, since it uses less digits than its factorization.

638752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19971 (or 19963 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 638752 is about 799.2196193788. The cubic root of 638752 is about 86.1213358499.

The spelling of 638752 in words is "six hundred thirty-eight thousand, seven hundred fifty-two".