23158891328 has 112 divisors (see below), whose sum is σ = 48058230528. Its totient is φ = 11063808000.

The previous prime is 23158891319. The next prime is 23158891339. The reversal of 23158891328 is 82319885132.

It is a happy number.

It is a super-2 number, since 2×23158891328² (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 15 ways as a sum of consecutive naturals, for example, 36701573 + ... + 36702203.

It is an arithmetic number, because the mean of its divisors is an integer number (429091344).

Almost surely, 2^23158891328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23158891328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24029115264).

23158891328 is an abundant number, since it is smaller than the sum of its proper divisors (24899339200).

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

23158891328 is a wasteful number, since it uses less digits than its factorization.

23158891328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 942 counting only the distinct ones).

The product of its digits is 829440, while the sum is 50.

The spelling of 23158891328 in words is "twenty-three billion, one hundred fifty-eight million, eight hundred ninety-one thousand, three hundred twenty-eight".