23311438 has 4 divisors (see below), whose sum is σ = 34967160. Its totient is φ = 11655718.

The previous prime is 23311433. The next prime is 23311439. The reversal of 23311438 is 83411332.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311433) by changing a digit.

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, 5827858 + ... + 5827861.

It is an arithmetic number, because the mean of its divisors is an integer number (8741790).

Almost surely, 2^23311438 is an apocalyptic number.

23311438 is a deficient number, since it is larger than the sum of its proper divisors (11655722).

23311438 is a wasteful number, since it uses less digits than its factorization.

23311438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11655721.

The product of its digits is 1728, while the sum is 25.

The square root of 23311438 is about 4828.1920011532. The cubic root of 23311438 is about 285.6645536536.

The spelling of 23311438 in words is "twenty-three million, three hundred eleven thousand, four hundred thirty-eight".