23139292 has 12 divisors (see below), whose sum is σ = 44175096. Its totient is φ = 10517840.

The previous prime is 23139287. The next prime is 23139307. The reversal of 23139292 is 29293132.

It is a happy number.

It is a super-2 number, since 2×23139292² = 1070853668522528, which 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, 262903 + ... + 262990.

It is an arithmetic number, because the mean of its divisors is an integer number (3681258).

Almost surely, 2^23139292 is an apocalyptic number.

23139292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

23139292 is a deficient number, since it is larger than the sum of its proper divisors (21035804).

23139292 is a wasteful number, since it uses less digits than its factorization.

23139292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525908 (or 525906 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 23139292 is about 4810.3317972880. The cubic root of 23139292 is about 284.9596413560.

The spelling of 23139292 in words is "twenty-three million, one hundred thirty-nine thousand, two hundred ninety-two".