23978815 has 8 divisors (see below), whose sum is σ = 32885280. Its totient is φ = 16442592.

The previous prime is 23978803. The next prime is 23978833. The reversal of 23978815 is 51887932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23978815 - 2¹⁹ = 23454527 is a prime.

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 in 7 ways as a sum of consecutive naturals, for example, 342520 + ... + 342589.

It is an arithmetic number, because the mean of its divisors is an integer number (4110660).

Almost surely, 2^23978815 is an apocalyptic number.

23978815 is a deficient number, since it is larger than the sum of its proper divisors (8906465).

23978815 is an equidigital number, since it uses as much as digits as its factorization.

23978815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685121.

The product of its digits is 120960, while the sum is 43.

The square root of 23978815 is about 4896.8168232026. The cubic root of 23978815 is about 288.3650166957.

The spelling of 23978815 in words is "twenty-three million, nine hundred seventy-eight thousand, eight hundred fifteen".