28880966980 has 24 divisors (see below), whose sum is σ = 60843813912. Its totient is φ = 11515475712.

The previous prime is 28880966923. The next prime is 28880966981. The reversal of 28880966980 is 8966908882.

It can be written as a sum of positive squares in 4 ways, for example, as 182574144 + 28698392836 = 13512^2 + 169406^2 .

It is a super-2 number, since 2×28880966980² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28880966981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2300527 + ... + 2313046.

It is an arithmetic number, because the mean of its divisors is an integer number (2535158913).

Almost surely, 2^28880966980 is an apocalyptic number.

28880966980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28880966980 is an abundant number, since it is smaller than the sum of its proper divisors (31962846932).

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

28880966980 is a wasteful number, since it uses less digits than its factorization.

28880966980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613895 (or 4613893 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 64.

The spelling of 28880966980 in words is "twenty-eight billion, eight hundred eighty million, nine hundred sixty-six thousand, nine hundred eighty".