23407978 has 8 divisors (see below), whose sum is σ = 38304000. Its totient is φ = 10639980.

The previous prime is 23407973. The next prime is 23407987. The reversal of 23407978 is 87970432.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23407978.

It is not an unprimeable number, because it can be changed into a prime (23407973) 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 3 ways as a sum of consecutive naturals, for example, 531978 + ... + 532021.

It is an arithmetic number, because the mean of its divisors is an integer number (4788000).

Almost surely, 2^23407978 is an apocalyptic number.

23407978 is a deficient number, since it is larger than the sum of its proper divisors (14896022).

23407978 is a wasteful number, since it uses less digits than its factorization.

23407978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064012.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 23407978 is about 4838.1792029647. The cubic root of 23407978 is about 286.0583528056.

The spelling of 23407978 in words is "twenty-three million, four hundred seven thousand, nine hundred seventy-eight".