28839511684 has 81 divisors (see below), whose sum is σ = 55101534831. Its totient is φ = 13205358720.

The previous prime is 28839511667. The next prime is 28839511693. The reversal of 28839511684 is 48611593882.

It is a happy number.

The square root of 28839511684 is 169822.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3609366084 + 25230145600 = 60078^2 + 158840^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 264582622 + ... + 264582730.

Almost surely, 2^28839511684 is an apocalyptic number.

28839511684 is the 169822-nd square number.

It is an amenable number.

28839511684 is a deficient number, since it is larger than the sum of its proper divisors (26262023147).

28839511684 is a wasteful number, since it uses less digits than its factorization.

28839511684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 171 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 55.

The spelling of 28839511684 in words is "twenty-eight billion, eight hundred thirty-nine million, five hundred eleven thousand, six hundred eighty-four".