28005527525280 has 96 divisors (see below), whose sum is σ = 89425869511104. Its totient is φ = 7365837367296.

The previous prime is 28005527525249. The next prime is 28005527525359. The reversal of 28005527525280 is 8252572550082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×28005527525280³ (a number of 41 digits) contains 333 as substring.

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, 399587214 + ... + 399657293.

It is an arithmetic number, because the mean of its divisors is an integer number (931519474074).

Almost surely, 2^{28005527525280} is an apocalyptic number.

28005527525280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28005527525280 is an abundant number, since it is smaller than the sum of its proper divisors (61420341985824).

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

28005527525280 is a wasteful number, since it uses less digits than its factorization.

28005527525280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799244598 (or 799244590 counting only the distinct ones).

The product of its (nonzero) digits is 4480000, while the sum is 51.

The spelling of 28005527525280 in words is "twenty-eight trillion, five billion, five hundred twenty-seven million, five hundred twenty-five thousand, two hundred eighty".