23090638 has 4 divisors (see below), whose sum is σ = 34635960. Its totient is φ = 11545318.

The previous prime is 23090633. The next prime is 23090647. The reversal of 23090638 is 83609032.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23090633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5772658 + ... + 5772661.

It is an arithmetic number, because the mean of its divisors is an integer number (8658990).

Almost surely, 2^23090638 is an apocalyptic number.

23090638 is a deficient number, since it is larger than the sum of its proper divisors (11545322).

23090638 is a wasteful number, since it uses less digits than its factorization.

23090638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545321.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 23090638 is about 4805.2718965736. The cubic root of 23090638 is about 284.7597770568.

The spelling of 23090638 in words is "twenty-three million, ninety thousand, six hundred thirty-eight".