23502240 has 144 divisors (see below), whose sum is σ = 84520800. Its totient is φ = 5930496.

The previous prime is 23502233. The next prime is 23502257. The reversal of 23502240 is 4220532.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26931 + ... + 27789.

It is an arithmetic number, because the mean of its divisors is an integer number (586950).

Almost surely, 2^23502240 is an apocalyptic number.

23502240 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 23502240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42260400).

23502240 is an abundant number, since it is smaller than the sum of its proper divisors (61018560).

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

23502240 is a wasteful number, since it uses less digits than its factorization.

23502240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 23502240 is about 4847.9108902702. The cubic root of 23502240 is about 286.4418163509.

Adding to 23502240 its reverse (4220532), we get a palindrome (27722772).

The spelling of 23502240 in words is "twenty-three million, five hundred two thousand, two hundred forty".