23540790 has 64 divisors (see below), whose sum is σ = 69543936. Its totient is φ = 4966272.

The previous prime is 23540773. The next prime is 23540809. The reversal of 23540790 is 9704532.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent 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 in 31 ways as a sum of consecutive naturals, for example, 1582 + ... + 7041.

It is an arithmetic number, because the mean of its divisors is an integer number (1086624).

Almost surely, 2^23540790 is an apocalyptic number.

23540790 is an abundant number, since it is smaller than the sum of its proper divisors (46003146).

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

23540790 is a wasteful number, since it uses less digits than its factorization.

23540790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8653.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 23540790 is about 4851.8852006205. The cubic root of 23540790 is about 286.5983446939.

Subtracting from 23540790 its product of nonzero digits (7560), we obtain a triangular number (23533230 = T₆₈₆₀).

The spelling of 23540790 in words is "twenty-three million, five hundred forty thousand, seven hundred ninety".