28088581765620 has 96 divisors (see below), whose sum is σ = 78723693272448. Its totient is φ = 7483084483072.

The previous prime is 28088581765571. The next prime is 28088581765697. The reversal of 28088581765620 is 2656718588082.

It is a super-2 number, since 2×28088581765620² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 472945567 + ... + 473004953.

It is an arithmetic number, because the mean of its divisors is an integer number (820038471588).

Almost surely, 2^{28088581765620} is an apocalyptic number.

28088581765620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28088581765620 is an abundant number, since it is smaller than the sum of its proper divisors (50635111506828).

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

28088581765620 is a wasteful number, since it uses less digits than its factorization.

28088581765620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66849 (or 66847 counting only the distinct ones).

The product of its (nonzero) digits is 103219200, while the sum is 66.

The spelling of 28088581765620 in words is "twenty-eight trillion, eighty-eight billion, five hundred eighty-one million, seven hundred sixty-five thousand, six hundred twenty".