28904715140 has 48 divisors (see below), whose sum is σ = 70207143552. Its totient is φ = 9790784256.

The previous prime is 28904715139. The next prime is 28904715233. The reversal of 28904715140 is 4151740982.

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, 1232129 + ... + 1255368.

It is an arithmetic number, because the mean of its divisors is an integer number (1462648824).

Almost surely, 2^28904715140 is an apocalyptic number.

28904715140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28904715140 is an abundant number, since it is smaller than the sum of its proper divisors (41302428412).

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

28904715140 is a wasteful number, since it uses less digits than its factorization.

28904715140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487596 (or 2487594 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 28904715140 in words is "twenty-eight billion, nine hundred four million, seven hundred fifteen thousand, one hundred forty".