28776358828 has 48 divisors (see below), whose sum is σ = 60606120960. Its totient is φ = 11688266304.

The previous prime is 28776358823. The next prime is 28776358829. The reversal of 28776358828 is 82885367782.

It is a self number, because there is not a number n which added to its sum of digits gives 28776358828.

It is not an unprimeable number, because it can be changed into a prime (28776358823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134776 + ... + 275167.

It is an arithmetic number, because the mean of its divisors is an integer number (1262627520).

Almost surely, 2^28776358828 is an apocalyptic number.

28776358828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28776358828 is an abundant number, since it is smaller than the sum of its proper divisors (31829762132).

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

28776358828 is a wasteful number, since it uses less digits than its factorization.

28776358828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410086 (or 410084 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 64.

The spelling of 28776358828 in words is "twenty-eight billion, seven hundred seventy-six million, three hundred fifty-eight thousand, eight hundred twenty-eight".