23090440 has 32 divisors (see below), whose sum is σ = 52202880. Its totient is φ = 9191872.

The previous prime is 23090423. The next prime is 23090447. The reversal of 23090440 is 4409032.

It is not an unprimeable number, because it can be changed into a prime (23090447) 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, 7809 + ... + 10351.

It is an arithmetic number, because the mean of its divisors is an integer number (1631340).

Almost surely, 2^23090440 is an apocalyptic number.

23090440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23090440 is an abundant number, since it is smaller than the sum of its proper divisors (29112440).

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

23090440 is a wasteful number, since it uses less digits than its factorization.

23090440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2777 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 23090440 is about 4805.2512941573. The cubic root of 23090440 is about 284.7589631253.

Adding to 23090440 its reverse (4409032), we get a palindrome (27499472).

The spelling of 23090440 in words is "twenty-three million, ninety thousand, four hundred forty".