23490240 has 56 divisors (see below), whose sum is σ = 74584560. Its totient is φ = 6263808.

The previous prime is 23490217. The next prime is 23490241. The reversal of 23490240 is 4209432.

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 23490240.

It is not an unprimeable number, because it can be changed into a prime (23490241) 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, 11275 + ... + 13194.

Almost surely, 2^23490240 is an apocalyptic number.

23490240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23490240 is an abundant number, since it is smaller than the sum of its proper divisors (51094320).

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

23490240 is a wasteful number, since it uses less digits than its factorization.

23490240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24489 (or 24479 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 23490240 is about 4846.6730857362. The cubic root of 23490240 is about 286.3930566443.

Adding to 23490240 its reverse (4209432), we get a palindrome (27699672).

The spelling of 23490240 in words is "twenty-three million, four hundred ninety thousand, two hundred forty".