23245440 has 64 divisors (see below), whose sum is σ = 74100960. Its totient is φ = 6198272.

The previous prime is 23245427. The next prime is 23245441. The reversal of 23245440 is 4454232.

It is a tau number, because it is divible by the number of its divisors (64).

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 23245440.

It is not an unprimeable number, because it can be changed into a prime (23245441) 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, 4134 + ... + 7973.

Almost surely, 2^23245440 is an apocalyptic number.

23245440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23245440 is an abundant number, since it is smaller than the sum of its proper divisors (50855520).

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

23245440 is a wasteful number, since it uses less digits than its factorization.

23245440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12129 (or 12117 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 23245440 is about 4821.3525073365. The cubic root of 23245440 is about 285.3947131663.

Adding to 23245440 its reverse (4454232), we get a palindrome (27699672).

The spelling of 23245440 in words is "twenty-three million, two hundred forty-five thousand, four hundred forty".