23088891 has 32 divisors (see below), whose sum is σ = 36403200. Its totient is φ = 12744576.

The previous prime is 23088889. The next prime is 23088899. The reversal of 23088891 is 19888032.

It is not a de Polignac number, because 23088891 - 2¹ = 23088889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23088899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146985 + ... + 147141.

It is an arithmetic number, because the mean of its divisors is an integer number (1137600).

Almost surely, 2^23088891 is an apocalyptic number.

23088891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23088891 is a deficient number, since it is larger than the sum of its proper divisors (13314309).

23088891 is a wasteful number, since it uses less digits than its factorization.

23088891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 23088891 is about 4805.0901136191. The cubic root of 23088891 is about 284.7525953890.

The spelling of 23088891 in words is "twenty-three million, eighty-eight thousand, eight hundred ninety-one".