28580776580 has 96 divisors (see below), whose sum is σ = 64971244800. Its totient is φ = 10528455168.

The previous prime is 28580776547. The next prime is 28580776613. The reversal of 28580776580 is 8567708582.

It is an interprime number because it is at equal distance from previous prime (28580776547) and next prime (28580776613).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5053034 + ... + 5058686.

It is an arithmetic number, because the mean of its divisors is an integer number (676783800).

Almost surely, 2^28580776580 is an apocalyptic number.

28580776580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28580776580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32485622400).

28580776580 is an abundant number, since it is smaller than the sum of its proper divisors (36390468220).

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

28580776580 is a wasteful number, since it uses less digits than its factorization.

28580776580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6093 (or 6091 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 28580776580 in words is "twenty-eight billion, five hundred eighty million, seven hundred seventy-six thousand, five hundred eighty".