23239440 has 320 divisors, whose sum is σ = 96422400. Its totient is φ = 5031936.

The previous prime is 23239439. The next prime is 23239481. The reversal of 23239440 is 4493232.

It is a happy number.

23239440 is a `hidden beast` number, since 232 + 394 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 438454 + ... + 438506.

It is an arithmetic number, because the mean of its divisors is an integer number (301320).

Almost surely, 2^23239440 is an apocalyptic number.

23239440 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 23239440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48211200).

23239440 is an abundant number, since it is smaller than the sum of its proper divisors (73182960).

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

23239440 is a wasteful number, since it uses less digits than its factorization.

23239440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 23239440 is about 4820.7302351407. The cubic root of 23239440 is about 285.3701561546.

The spelling of 23239440 in words is "twenty-three million, two hundred thirty-nine thousand, four hundred forty".