3638881233 has 32 divisors (see below), whose sum is σ = 5816657280. Its totient is φ = 2235055680.

The previous prime is 3638881199. The next prime is 3638881271. The reversal of 3638881233 is 3321888363.

3638881233 is a `hidden beast` number, since 3 + 638 + 8 + 8 + 1 + 2 + 3 + 3 = 666.

It is not a de Polignac number, because 3638881233 - 2¹⁴ = 3638864849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3638881283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180310 + ... + 199472.

It is an arithmetic number, because the mean of its divisors is an integer number (181770540).

Almost surely, 2^3638881233 is an apocalyptic number.

It is an amenable number.

3638881233 is a deficient number, since it is larger than the sum of its proper divisors (2177776047).

3638881233 is a wasteful number, since it uses less digits than its factorization.

3638881233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19726 (or 19720 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 3638881233 is about 60323.1401122322. The cubic root of 3638881233 is about 1538.1167220103.

The spelling of 3638881233 in words is "three billion, six hundred thirty-eight million, eight hundred eighty-one thousand, two hundred thirty-three".