3638479494 has 32 divisors (see below), whose sum is σ = 7864464384. Its totient is φ = 1115569440.

The previous prime is 3638479487. The next prime is 3638479511. The reversal of 3638479494 is 4949748363.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60342 + ... + 104489.

It is an arithmetic number, because the mean of its divisors is an integer number (245764512).

Almost surely, 2^3638479494 is an apocalyptic number.

3638479494 is an abundant number, since it is smaller than the sum of its proper divisors (4225984890).

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

3638479494 is a wasteful number, since it uses less digits than its factorization.

3638479494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165132.

The product of its digits is 15676416, while the sum is 57.

The square root of 3638479494 is about 60319.8101290115. The cubic root of 3638479494 is about 1538.0601163143.

The spelling of 3638479494 in words is "three billion, six hundred thirty-eight million, four hundred seventy-nine thousand, four hundred ninety-four".