3638131690 has 16 divisors (see below), whose sum is σ = 6552908928. Its totient is φ = 1454303376.

The previous prime is 3638131681. The next prime is 3638131709. The reversal of 3638131690 is 961318363.

It is a super-2 number, since 2×3638131690² = 26472004387564512200, 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, 102462 + ... + 133321.

It is an arithmetic number, because the mean of its divisors is an integer number (409556808).

Almost surely, 2^3638131690 is an apocalyptic number.

3638131690 is a deficient number, since it is larger than the sum of its proper divisors (2914777238).

3638131690 is a wasteful number, since it uses less digits than its factorization.

3638131690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237333.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 3638131690 is about 60316.9270603203. The cubic root of 3638131690 is about 1538.0111067846.

The spelling of 3638131690 in words is "three billion, six hundred thirty-eight million, one hundred thirty-one thousand, six hundred ninety".