28977847875 has 64 divisors (see below), whose sum is σ = 53626435200. Its totient is φ = 15440544000.

The previous prime is 28977847859. The next prime is 28977847901. The reversal of 28977847875 is 57874877982.

28977847875 is a `hidden beast` number, since 2 + 89 + 7 + 7 + 8 + 478 + 75 = 666.

It is not a de Polignac number, because 28977847875 - 2⁴ = 28977847859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4347045 + ... + 4353705.

It is an arithmetic number, because the mean of its divisors is an integer number (837913050).

Almost surely, 2^28977847875 is an apocalyptic number.

28977847875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28977847875 is a deficient number, since it is larger than the sum of its proper divisors (24648587325).

28977847875 is a wasteful number, since it uses less digits than its factorization.

28977847875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7974 (or 7958 counting only the distinct ones).

The product of its digits is 442552320, while the sum is 72.

The spelling of 28977847875 in words is "twenty-eight billion, nine hundred seventy-seven million, eight hundred forty-seven thousand, eight hundred seventy-five".