28507828280 has 32 divisors (see below), whose sum is σ = 64177064640. Its totient is φ = 11397006720.

The previous prime is 28507828277. The next prime is 28507828319. The reversal of 28507828280 is 8282870582.

It is a congruent number.

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, 115619 + ... + 265298.

It is an arithmetic number, because the mean of its divisors is an integer number (2005533270).

Almost surely, 2^28507828280 is an apocalyptic number.

28507828280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28507828280 is an abundant number, since it is smaller than the sum of its proper divisors (35669236360).

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

28507828280 is a wasteful number, since it uses less digits than its factorization.

28507828280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382799 (or 382795 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 50.

The spelling of 28507828280 in words is "twenty-eight billion, five hundred seven million, eight hundred twenty-eight thousand, two hundred eighty".