23515438 has 4 divisors (see below), whose sum is σ = 35273160. Its totient is φ = 11757718.

The previous prime is 23515423. The next prime is 23515441. The reversal of 23515438 is 83451532.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5878858 + ... + 5878861.

It is an arithmetic number, because the mean of its divisors is an integer number (8818290).

Almost surely, 2^23515438 is an apocalyptic number.

23515438 is a deficient number, since it is larger than the sum of its proper divisors (11757722).

23515438 is a wasteful number, since it uses less digits than its factorization.

23515438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11757721.

The product of its digits is 14400, while the sum is 31.

The square root of 23515438 is about 4849.2719041110. The cubic root of 23515438 is about 286.4954247396.

The spelling of 23515438 in words is "twenty-three million, five hundred fifteen thousand, four hundred thirty-eight".