23138857 has 8 divisors (see below), whose sum is σ = 26692416. Its totient is φ = 19647312.

The previous prime is 23138849. The next prime is 23138867. The reversal of 23138857 is 75883132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23138857 - 2³ = 23138849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23138867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14698 + ... + 16195.

It is an arithmetic number, because the mean of its divisors is an integer number (3336552).

Almost surely, 2^23138857 is an apocalyptic number.

It is an amenable number.

23138857 is a deficient number, since it is larger than the sum of its proper divisors (3553559).

23138857 is a wasteful number, since it uses less digits than its factorization.

23138857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31007.

The product of its digits is 40320, while the sum is 37.

The square root of 23138857 is about 4810.2865818993. The cubic root of 23138857 is about 284.9578556744.

The spelling of 23138857 in words is "twenty-three million, one hundred thirty-eight thousand, eight hundred fifty-seven".