23992440 has 128 divisors (see below), whose sum is σ = 80352000. Its totient is φ = 5695488.

The previous prime is 23992429. The next prime is 23992453. The reversal of 23992440 is 4429932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38451 + ... + 39069.

It is an arithmetic number, because the mean of its divisors is an integer number (627750).

Almost surely, 2^23992440 is an apocalyptic number.

23992440 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 23992440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40176000).

23992440 is an abundant number, since it is smaller than the sum of its proper divisors (56359560).

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

23992440 is a wasteful number, since it uses less digits than its factorization.

23992440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 23992440 is about 4898.2078355252. The cubic root of 23992440 is about 288.4196236398.

The spelling of 23992440 in words is "twenty-three million, nine hundred ninety-two thousand, four hundred forty".