38889894433 has 16 divisors (see below), whose sum is σ = 45072021456. Its totient is φ = 33232803840.

The previous prime is 38889894401. The next prime is 38889894437. The reversal of 38889894433 is 33449898883.

It can be written as a sum of positive squares in 8 ways, for example, as 2878000609 + 36011893824 = 53647^2 + 189768^2 .

It is a cyclic number.

It is not a de Polignac number, because 38889894433 - 2⁵ = 38889894401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38889894437) 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, 1428916 + ... + 1455877.

It is an arithmetic number, because the mean of its divisors is an integer number (2817001341).

Almost surely, 2^38889894433 is an apocalyptic number.

It is an amenable number.

38889894433 is a deficient number, since it is larger than the sum of its proper divisors (6182127023).

38889894433 is a wasteful number, since it uses less digits than its factorization.

38889894433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884884.

The product of its digits is 143327232, while the sum is 67.

The spelling of 38889894433 in words is "thirty-eight billion, eight hundred eighty-nine million, eight hundred ninety-four thousand, four hundred thirty-three".