23402790 has 32 divisors (see below), whose sum is σ = 62408160. Its totient is φ = 6240672.

The previous prime is 23402783. The next prime is 23402791. The reversal of 23402790 is 9720432.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23402791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43069 + ... + 43608.

It is an arithmetic number, because the mean of its divisors is an integer number (1950255).

Almost surely, 2^23402790 is an apocalyptic number.

23402790 is an abundant number, since it is smaller than the sum of its proper divisors (39005370).

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

23402790 is a wasteful number, since it uses less digits than its factorization.

23402790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86693 (or 86687 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 23402790 is about 4837.6430211416. The cubic root of 23402790 is about 286.0372178406.

The spelling of 23402790 in words is "twenty-three million, four hundred two thousand, seven hundred ninety".