3638996394 has 32 divisors (see below), whose sum is σ = 8357506560. Its totient is φ = 1044687600.

The previous prime is 3638996351. The next prime is 3638996399. The reversal of 3638996394 is 4936998363.

It is not an unprimeable number, because it can be changed into a prime (3638996399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449702 + ... + 1452209.

It is an arithmetic number, because the mean of its divisors is an integer number (261172080).

Almost surely, 2^3638996394 is an apocalyptic number.

3638996394 is an abundant number, since it is smaller than the sum of its proper divisors (4718510166).

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

3638996394 is a wasteful number, since it uses less digits than its factorization.

3638996394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901946.

The product of its digits is 22674816, while the sum is 60.

The square root of 3638996394 is about 60324.0946388754. The cubic root of 3638996394 is about 1538.1329476193.

The spelling of 3638996394 in words is "three billion, six hundred thirty-eight million, nine hundred ninety-six thousand, three hundred ninety-four".