23309978 has 8 divisors (see below), whose sum is σ = 35179968. Its totient is φ = 11583324.

The previous prime is 23309959. The next prime is 23309981. The reversal of 23309978 is 87990332.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35426 + ... + 36077.

It is an arithmetic number, because the mean of its divisors is an integer number (4397496).

Almost surely, 2^23309978 is an apocalyptic number.

23309978 is a deficient number, since it is larger than the sum of its proper divisors (11869990).

23309978 is a wasteful number, since it uses less digits than its factorization.

23309978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71668.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 23309978 is about 4828.0408034730. The cubic root of 23309978 is about 285.6585897864.

The spelling of 23309978 in words is "twenty-three million, three hundred nine thousand, nine hundred seventy-eight".