28791042964 has 24 divisors (see below), whose sum is σ = 50625462888. Its totient is φ = 14326686720.

The previous prime is 28791042949. The next prime is 28791042991. The reversal of 28791042964 is 46924019782.

It can be written as a sum of positive squares in 4 ways, for example, as 11077562500 + 17713480464 = 105250^2 + 133092^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246254 + ... + 2259034.

It is an arithmetic number, because the mean of its divisors is an integer number (2109394287).

Almost surely, 2^28791042964 is an apocalyptic number.

It is an amenable number.

28791042964 is a deficient number, since it is larger than the sum of its proper divisors (21834419924).

28791042964 is a wasteful number, since it uses less digits than its factorization.

28791042964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15435 (or 15433 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 28791042964 in words is "twenty-eight billion, seven hundred ninety-one million, forty-two thousand, nine hundred sixty-four".