28829021928 has 64 divisors (see below), whose sum is σ = 85949890560. Its totient is φ = 7878737856.

The previous prime is 28829021899. The next prime is 28829021941. The reversal of 28829021928 is 82912092882.

It is a super-2 number, since 2×28829021928² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3726600 + ... + 3734327.

It is an arithmetic number, because the mean of its divisors is an integer number (1342967040).

Almost surely, 2^28829021928 is an apocalyptic number.

28829021928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28829021928 is an abundant number, since it is smaller than the sum of its proper divisors (57120868632).

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

28829021928 is a wasteful number, since it uses less digits than its factorization.

28829021928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7460966 (or 7460962 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 28829021928 in words is "twenty-eight billion, eight hundred twenty-nine million, twenty-one thousand, nine hundred twenty-eight".