23397138 has 12 divisors (see below), whose sum is σ = 50693838. Its totient is φ = 7799040.

The previous prime is 23397131. The next prime is 23397139. The reversal of 23397138 is 83179332.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23068809 + 328329 = 4803^2 + 573^2 .

It is not an unprimeable number, because it can be changed into a prime (23397131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 649903 + ... + 649938.

Almost surely, 2^23397138 is an apocalyptic number.

23397138 is an abundant number, since it is smaller than the sum of its proper divisors (27296700).

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

23397138 is a wasteful number, since it uses less digits than its factorization.

23397138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299849 (or 1299846 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 23397138 is about 4837.0588170912. The cubic root of 23397138 is about 286.0141890690.

The spelling of 23397138 in words is "twenty-three million, three hundred ninety-seven thousand, one hundred thirty-eight".