23400642 has 16 divisors (see below), whose sum is σ = 47797632. Its totient is φ = 7634160.

The previous prime is 23400617. The next prime is 23400649. The reversal of 23400642 is 24600432.

It is not an unprimeable number, because it can be changed into a prime (23400649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41209 + ... + 41772.

It is an arithmetic number, because the mean of its divisors is an integer number (2987352).

Almost surely, 2^23400642 is an apocalyptic number.

23400642 is an abundant number, since it is smaller than the sum of its proper divisors (24396990).

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

23400642 is a wasteful number, since it uses less digits than its factorization.

23400642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83033.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 23400642 is about 4837.4210071070. The cubic root of 23400642 is about 286.0284663664.

It can be divided in two parts, 23400 and 642, that added together give a palindrome (24042).

The spelling of 23400642 in words is "twenty-three million, four hundred thousand, six hundred forty-two".