28319238988 has 12 divisors (see below), whose sum is σ = 50013335680. Its totient is φ = 14029714512.

The previous prime is 28319238967. The next prime is 28319239019. The reversal of 28319238988 is 88983291382.

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, 32475756 + ... + 32476627.

Almost surely, 2^28319238988 is an apocalyptic number.

It is an amenable number.

28319238988 is a deficient number, since it is larger than the sum of its proper divisors (21694096692).

28319238988 is a wasteful number, since it uses less digits than its factorization.

28319238988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64952496 (or 64952494 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 61.

The spelling of 28319238988 in words is "twenty-eight billion, three hundred nineteen million, two hundred thirty-eight thousand, nine hundred eighty-eight".