23326440 has 64 divisors (see below), whose sum is σ = 72403200. Its totient is φ = 6004992.

The previous prime is 23326427. The next prime is 23326451. The reversal of 23326440 is 4462332.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23326440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129 + ... + 6831.

It is an arithmetic number, because the mean of its divisors is an integer number (1131300).

Almost surely, 2^23326440 is an apocalyptic number.

23326440 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 23326440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36201600).

23326440 is an abundant number, since it is smaller than the sum of its proper divisors (49076760).

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

23326440 is a wasteful number, since it uses less digits than its factorization.

23326440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746 (or 6742 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 23326440 is about 4829.7453349012. The cubic root of 23326440 is about 285.7258200105.

Adding to 23326440 its reverse (4462332), we get a palindrome (27788772).

The spelling of 23326440 in words is "twenty-three million, three hundred twenty-six thousand, four hundred forty".