28581116080 has 40 divisors (see below), whose sum is σ = 72492105744. Its totient is φ = 10393132800.

The previous prime is 28581116071. The next prime is 28581116099. The reversal of 28581116080 is 8061118582.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16238391 + ... + 16240150.

Almost surely, 2^28581116080 is an apocalyptic number.

28581116080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28581116080 is an abundant number, since it is smaller than the sum of its proper divisors (43910989664).

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

28581116080 is a wasteful number, since it uses less digits than its factorization.

28581116080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32478565 (or 32478559 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 40.

The spelling of 28581116080 in words is "twenty-eight billion, five hundred eighty-one million, one hundred sixteen thousand, eighty".