638700 has 36 divisors (see below), whose sum is σ = 1848840. Its totient is φ = 170240.

The previous prime is 638699. The next prime is 638717. The reversal of 638700 is 7836.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 765 + ... + 1364.

2⁶³⁸⁷⁰⁰ is an apocalyptic number.

638700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638700 is an abundant number, since it is smaller than the sum of its proper divisors (1210140).

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

638700 is a wasteful number, since it uses less digits than its factorization.

638700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 638700 is about 799.1870869828. The cubic root of 638700 is about 86.1189987765.

The spelling of 638700 in words is "six hundred thirty-eight thousand, seven hundred".