23638491 has 6 divisors (see below), whose sum is σ = 34144500. Its totient is φ = 15758988.

The previous prime is 23638487. The next prime is 23638499. The reversal of 23638491 is 19483632.

It is not a de Polignac number, because 23638491 - 2² = 23638487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23638499) 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, 1313241 + ... + 1313258.

It is an arithmetic number, because the mean of its divisors is an integer number (5690750).

Almost surely, 2^23638491 is an apocalyptic number.

23638491 is a deficient number, since it is larger than the sum of its proper divisors (10506009).

23638491 is a wasteful number, since it uses less digits than its factorization.

23638491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626505 (or 2626502 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 23638491 is about 4861.9431300664. The cubic root of 23638491 is about 286.9942857624.

The spelling of 23638491 in words is "twenty-three million, six hundred thirty-eight thousand, four hundred ninety-one".