28612289960 has 32 divisors (see below), whose sum is σ = 68164574760. Its totient is φ = 10771685376.

The previous prime is 28612289879. The next prime is 28612289987. The reversal of 28612289960 is 6998221682.

It can be written as a sum of positive squares in 4 ways, for example, as 25653147556 + 2959142404 = 160166^2 + 54398^2 .

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, 21037769 + ... + 21039128.

Almost surely, 2^28612289960 is an apocalyptic number.

28612289960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28612289960 is an abundant number, since it is smaller than the sum of its proper divisors (39552284800).

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

28612289960 is a wasteful number, since it uses less digits than its factorization.

28612289960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42076925 (or 42076921 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 28612289960 in words is "twenty-eight billion, six hundred twelve million, two hundred eighty-nine thousand, nine hundred sixty".