638001682 has 16 divisors (see below), whose sum is σ = 991497600. Its totient is φ = 307535760.

The previous prime is 638001667. The next prime is 638001701. The reversal of 638001682 is 286100836.

It is a super-2 number, since 2×638001682² = 814092292469658248, which contains 22 as substring.

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, 32119 + ... + 48037.

It is an arithmetic number, because the mean of its divisors is an integer number (61968600).

Almost surely, 2^638001682 is an apocalyptic number.

638001682 is a deficient number, since it is larger than the sum of its proper divisors (353495918).

638001682 is a wasteful number, since it uses less digits than its factorization.

638001682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16641.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 638001682 is about 25258.6951761171. The cubic root of 638001682 is about 860.8760147067.

The spelling of 638001682 in words is "six hundred thirty-eight million, one thousand, six hundred eighty-two".