28887228972 has 36 divisors (see below), whose sum is σ = 83451995536. Its totient is φ = 8253493920.

The previous prime is 28887228961. The next prime is 28887229027. The reversal of 28887228972 is 27982278882.

28887228972 is a `hidden beast` number, since 288 + 8 + 7 + 2 + 289 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57315679 + ... + 57316182.

Almost surely, 2^28887228972 is an apocalyptic number.

It is an amenable number.

28887228972 is an abundant number, since it is smaller than the sum of its proper divisors (54564766564).

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

28887228972 is a wasteful number, since it uses less digits than its factorization.

28887228972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114631878 (or 114631873 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 63.

The spelling of 28887228972 in words is "twenty-eight billion, eight hundred eighty-seven million, two hundred twenty-eight thousand, nine hundred seventy-two".