23979838 has 4 divisors (see below), whose sum is σ = 35969760. Its totient is φ = 11989918.

The previous prime is 23979829. The next prime is 23979841. The reversal of 23979838 is 83897932.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 23979791 and 23979800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5994958 + ... + 5994961.

It is an arithmetic number, because the mean of its divisors is an integer number (8992440).

Almost surely, 2^23979838 is an apocalyptic number.

23979838 is a deficient number, since it is larger than the sum of its proper divisors (11989922).

23979838 is a wasteful number, since it uses less digits than its factorization.

23979838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989921.

The product of its digits is 653184, while the sum is 49.

The square root of 23979838 is about 4896.9212777009. The cubic root of 23979838 is about 288.3691174435.

The spelling of 23979838 in words is "twenty-three million, nine hundred seventy-nine thousand, eight hundred thirty-eight".