638251082 has 16 divisors (see below), whose sum is σ = 1131874560. Its totient is φ = 264103728.

The previous prime is 638251063. The next prime is 638251099. The reversal of 638251082 is 280152836.

638251082 is a modest number, since divided by 251082 gives 638 as remainder.

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, 785618 + ... + 786429.

It is an arithmetic number, because the mean of its divisors is an integer number (70742160).

Almost surely, 2^638251082 is an apocalyptic number.

638251082 is a deficient number, since it is larger than the sum of its proper divisors (493623478).

638251082 is a wasteful number, since it uses less digits than its factorization.

638251082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572085.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 638251082 is about 25263.6316075104. The cubic root of 638251082 is about 860.9881745509.

The spelling of 638251082 in words is "six hundred thirty-eight million, two hundred fifty-one thousand, eighty-two".