3638131960 has 32 divisors (see below), whose sum is σ = 8376168240. Its totient is φ = 1421409024.

The previous prime is 3638131933. The next prime is 3638131993. The reversal of 3638131960 is 691318363.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055877 + ... + 1059316.

Almost surely, 2^3638131960 is an apocalyptic number.

It is an amenable number.

3638131960 is an abundant number, since it is smaller than the sum of its proper divisors (4738036280).

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

3638131960 is a wasteful number, since it uses less digits than its factorization.

3638131960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115247 (or 2115243 counting only the distinct ones).

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

The square root of 3638131960 is about 60316.9292984979. The cubic root of 3638131960 is about 1538.0111448319.

The spelling of 3638131960 in words is "three billion, six hundred thirty-eight million, one hundred thirty-one thousand, nine hundred sixty".