28889177462856 has 96 divisors (see below), whose sum is σ = 83448665740440. Its totient is φ = 8997116043264.

The previous prime is 28889177462833. The next prime is 28889177462857. The reversal of 28889177462856 is 65826477198882.

28889177462856 is a `hidden beast` number, since 2 + 8 + 8 + 8 + 9 + 1 + 77 + 462 + 85 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27594702400356 + 1294475062500 = 5253066^2 + 1137750^2 .

It is not an unprimeable number, because it can be changed into a prime (28889177462857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85971981 + ... + 86307356.

Almost surely, 2^{28889177462856} is an apocalyptic number.

It is an amenable number.

28889177462856 is an abundant number, since it is smaller than the sum of its proper divisors (54559488277584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28889177462856 is a wasteful number, since it uses less digits than its factorization.

28889177462856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172279503 (or 172279496 counting only the distinct ones).

The product of its digits is 5202247680, while the sum is 81.

The spelling of 28889177462856 in words is "twenty-eight trillion, eight hundred eighty-nine billion, one hundred seventy-seven million, four hundred sixty-two thousand, eight hundred fifty-six".