23172426 has 16 divisors (see below), whose sum is σ = 51494400. Its totient is φ = 7724124.

The previous prime is 23172389. The next prime is 23172437. The reversal of 23172426 is 62427132.

23172426 is a `hidden beast` number, since 231 + 7 + 2 + 426 = 666.

It is a super-2 number, since 2×23172426² = 1073922653450952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 23172426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214506 + ... + 214613.

It is an arithmetic number, because the mean of its divisors is an integer number (3218400).

Almost surely, 2^23172426 is an apocalyptic number.

23172426 is an abundant number, since it is smaller than the sum of its proper divisors (28321974).

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

23172426 is a wasteful number, since it uses less digits than its factorization.

23172426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429130 (or 429124 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 23172426 is about 4813.7746104279. The cubic root of 23172426 is about 285.0955912031.

Adding to 23172426 its reverse (62427132), we get a palindrome (85599558).

The spelling of 23172426 in words is "twenty-three million, one hundred seventy-two thousand, four hundred twenty-six".