638682124 has 12 divisors (see below), whose sum is σ = 1166289264. Its totient is φ = 305456624.

The previous prime is 638682113. The next prime is 638682137. The reversal of 638682124 is 421286836.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3471007 + ... + 3471190.

It is an arithmetic number, because the mean of its divisors is an integer number (97190772).

Almost surely, 2^638682124 is an apocalyptic number.

It is an amenable number.

638682124 is a deficient number, since it is larger than the sum of its proper divisors (527607140).

638682124 is a wasteful number, since it uses less digits than its factorization.

638682124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6942224 (or 6942222 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 638682124 is about 25272.1610472868. The cubic root of 638682124 is about 861.1819533322.

The spelling of 638682124 in words is "six hundred thirty-eight million, six hundred eighty-two thousand, one hundred twenty-four".