23258978 has 4 divisors (see below), whose sum is σ = 34888470. Its totient is φ = 11629488.

The previous prime is 23258969. The next prime is 23258999. The reversal of 23258978 is 87985232.

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

It can be written as a sum of positive squares in only one way, i.e., 15547249 + 7711729 = 3943^2 + 2777^2 .

It is a Curzon number.

It is an unprimeable number.

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, 5814743 + ... + 5814746.

Almost surely, 2^23258978 is an apocalyptic number.

23258978 is a deficient number, since it is larger than the sum of its proper divisors (11629492).

23258978 is a wasteful number, since it uses less digits than its factorization.

23258978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11629491.

The product of its digits is 241920, while the sum is 44.

The square root of 23258978 is about 4822.7562658712. The cubic root of 23258978 is about 285.4501064508.

The spelling of 23258978 in words is "twenty-three million, two hundred fifty-eight thousand, nine hundred seventy-eight".