28888759621540 has 96 divisors (see below), whose sum is σ = 74670437124864. Its totient is φ = 9142313633280.

The previous prime is 28888759621523. The next prime is 28888759621577. The reversal of 28888759621540 is 4512695788882.

It is a super-2 number, since 2×28888759621540² (a number of 28 digits) contains 22 as substring.

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, 33401350 + ... + 34255330.

It is an arithmetic number, because the mean of its divisors is an integer number (777817053384).

Almost surely, 2^{28888759621540} is an apocalyptic number.

28888759621540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28888759621540 is an abundant number, since it is smaller than the sum of its proper divisors (45781677503324).

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

28888759621540 is a wasteful number, since it uses less digits than its factorization.

28888759621540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872597 (or 872595 counting only the distinct ones).

The product of its (nonzero) digits is 619315200, while the sum is 73.

The spelling of 28888759621540 in words is "twenty-eight trillion, eight hundred eighty-eight billion, seven hundred fifty-nine million, six hundred twenty-one thousand, five hundred forty".