23081790 has 32 divisors (see below), whose sum is σ = 56308896. Its totient is φ = 6053760.

The previous prime is 23081783. The next prime is 23081791. The reversal of 23081790 is 9718032.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23081791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4477 + ... + 8136.

It is an arithmetic number, because the mean of its divisors is an integer number (1759653).

Almost surely, 2^23081790 is an apocalyptic number.

23081790 is an abundant number, since it is smaller than the sum of its proper divisors (33227106).

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

23081790 is a wasteful number, since it uses less digits than its factorization.

23081790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 23081790 is about 4804.3511528613. The cubic root of 23081790 is about 284.7234004613.

It can be divided in two parts, 23081 and 790, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 23081790 in words is "twenty-three million, eighty-one thousand, seven hundred ninety".