28525990730880 has 256 divisors, whose sum is σ = 96488068838400. Its totient is φ = 7152868749312.

The previous prime is 28525990730863. The next prime is 28525990730899. The reversal of 28525990730880 is 8803709952582.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2868874 + ... + 8079753.

It is an arithmetic number, because the mean of its divisors is an integer number (376906518900).

Almost surely, 2^{28525990730880} is an apocalyptic number.

28525990730880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28525990730880 is an abundant number, since it is smaller than the sum of its proper divisors (67962078107520).

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

28525990730880 is a wasteful number, since it uses less digits than its factorization.

28525990730880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10948731 (or 10948719 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 66.

The spelling of 28525990730880 in words is "twenty-eight trillion, five hundred twenty-five billion, nine hundred ninety million, seven hundred thirty thousand, eight hundred eighty".