23308978 has 16 divisors (see below), whose sum is σ = 43591104. Its totient is φ = 9081360.

The previous prime is 23308969. The next prime is 23308979. The reversal of 23308978 is 87980332.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 23308978.

It is not an unprimeable number, because it can be changed into a prime (23308979) 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 in 7 ways as a sum of consecutive naturals, for example, 75525 + ... + 75832.

It is an arithmetic number, because the mean of its divisors is an integer number (2724444).

Almost surely, 2^23308978 is an apocalyptic number.

23308978 is a deficient number, since it is larger than the sum of its proper divisors (20282126).

23308978 is a wasteful number, since it uses less digits than its factorization.

23308978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151377.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 23308978 is about 4827.9372406857. The cubic root of 23308978 is about 285.6545048022.

The spelling of 23308978 in words is "twenty-three million, three hundred eight thousand, nine hundred seventy-eight".