28158522688 has 28 divisors (see below), whose sum is σ = 57065948352. Its totient is φ = 13779701120.

The previous prime is 28158522673. The next prime is 28158522703. The reversal of 28158522688 is 88622585182.

It is an interprime number because it is at equal distance from previous prime (28158522673) and next prime (28158522703).

It is a super-2 number, since 2×28158522688² (a number of 22 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 3 ways as a sum of consecutive naturals, for example, 4677598 + ... + 4683613.

It is an arithmetic number, because the mean of its divisors is an integer number (2038069584).

Almost surely, 2^28158522688 is an apocalyptic number.

It is an amenable number.

28158522688 is an abundant number, since it is smaller than the sum of its proper divisors (28907425664).

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

28158522688 is an equidigital number, since it uses as much as digits as its factorization.

28158522688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9361270 (or 9361260 counting only the distinct ones).

The product of its digits is 4915200, while the sum is 55.

The spelling of 28158522688 in words is "twenty-eight billion, one hundred fifty-eight million, five hundred twenty-two thousand, six hundred eighty-eight".