23409978 has 32 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 7625520.

The previous prime is 23409977. The next prime is 23410019. The reversal of 23409978 is 87990432.

It is not an unprimeable number, because it can be changed into a prime (23409973) 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 15 ways as a sum of consecutive naturals, for example, 76101 + ... + 76407.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^23409978 is an apocalyptic number.

23409978 is an abundant number, since it is smaller than the sum of its proper divisors (24490182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23409978 is a wasteful number, since it uses less digits than its factorization.

23409978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 23409978 is about 4838.3858878762. The cubic root of 23409978 is about 286.0664996066.

The spelling of 23409978 in words is "twenty-three million, four hundred nine thousand, nine hundred seventy-eight".