23157378 has 12 divisors (see below), whose sum is σ = 50174358. Its totient is φ = 7719120.

The previous prime is 23157373. The next prime is 23157397. The reversal of 23157378 is 87375132.

23157378 is a `hidden beast` number, since 231 + 57 + 378 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 2934369 = 4497^2 + 1713^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23157373) 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, 643243 + ... + 643278.

Almost surely, 2^23157378 is an apocalyptic number.

23157378 is an abundant number, since it is smaller than the sum of its proper divisors (27016980).

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

23157378 is a wasteful number, since it uses less digits than its factorization.

23157378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286529 (or 1286526 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 23157378 is about 4812.2113419924. The cubic root of 23157378 is about 285.0338648586.

The spelling of 23157378 in words is "twenty-three million, one hundred fifty-seven thousand, three hundred seventy-eight".