28640254264 has 16 divisors (see below), whose sum is σ = 54843040800. Its totient is φ = 14015443392.

The previous prime is 28640254231. The next prime is 28640254271. The reversal of 28640254264 is 46245204682.

It is a self number, because there is not a number n which added to its sum of digits gives 28640254264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38085069 + ... + 38085820.

It is an arithmetic number, because the mean of its divisors is an integer number (3427690050).

Almost surely, 2^28640254264 is an apocalyptic number.

It is an amenable number.

28640254264 is a deficient number, since it is larger than the sum of its proper divisors (26202786536).

28640254264 is a wasteful number, since it uses less digits than its factorization.

28640254264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76170942 (or 76170938 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 43.

The spelling of 28640254264 in words is "twenty-eight billion, six hundred forty million, two hundred fifty-four thousand, two hundred sixty-four".