23090040 has 96 divisors (see below), whose sum is σ = 77500800. Its totient is φ = 5955840.

The previous prime is 23090027. The next prime is 23090047. The reversal of 23090040 is 4009032.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23089995 and 23090022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23090047) 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 23 ways as a sum of consecutive naturals, for example, 10126 + ... + 12194.

It is an arithmetic number, because the mean of its divisors is an integer number (807300).

Almost surely, 2^23090040 is an apocalyptic number.

23090040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23090040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38750400).

23090040 is an abundant number, since it is smaller than the sum of its proper divisors (54410760).

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

23090040 is a wasteful number, since it uses less digits than its factorization.

23090040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 23090040 is about 4805.2096728447. The cubic root of 23090040 is about 284.7573188049.

Adding to 23090040 its reverse (4009032), we get a palindrome (27099072).

The spelling of 23090040 in words is "twenty-three million, ninety thousand, forty".