28952978980 has 24 divisors (see below), whose sum is σ = 61152715512. Its totient is φ = 11514246912.

The previous prime is 28952978969. The next prime is 28952979037. The reversal of 28952978980 is 8987925982.

It can be written as a sum of positive squares in 4 ways, for example, as 11011983844 + 17940995136 = 104938^2 + 133944^2 .

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, 4180497 + ... + 4187416.

It is an arithmetic number, because the mean of its divisors is an integer number (2548029813).

Almost surely, 2^28952978980 is an apocalyptic number.

28952978980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28952978980 is an abundant number, since it is smaller than the sum of its proper divisors (32199736532).

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

28952978980 is a wasteful number, since it uses less digits than its factorization.

28952978980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368095 (or 8368093 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 67.

The spelling of 28952978980 in words is "twenty-eight billion, nine hundred fifty-two million, nine hundred seventy-eight thousand, nine hundred eighty".