28521727388 has 48 divisors (see below), whose sum is σ = 62471533824. Its totient is φ = 11069091840.

The previous prime is 28521727357. The next prime is 28521727397. The reversal of 28521727388 is 88372712582.

It is a congruent number.

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, 101006 + ... + 259317.

It is an arithmetic number, because the mean of its divisors is an integer number (1301490288).

Almost surely, 2^28521727388 is an apocalyptic number.

28521727388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28521727388 is an abundant number, since it is smaller than the sum of its proper divisors (33949806436).

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

28521727388 is a wasteful number, since it uses less digits than its factorization.

28521727388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360602 (or 360600 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 53.

The spelling of 28521727388 in words is "twenty-eight billion, five hundred twenty-one million, seven hundred twenty-seven thousand, three hundred eighty-eight".