23230440 has 96 divisors (see below), whose sum is σ = 76138920. Its totient is φ = 6142464.

The previous prime is 23230429. The next prime is 23230457. The reversal of 23230440 is 4403232.

It can be written as a sum of positive squares in 4 ways, for example, as 22297284 + 933156 = 4722^2 + 966^2 .

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, 62094 + ... + 62466.

Almost surely, 2^23230440 is an apocalyptic number.

23230440 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 23230440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38069460).

23230440 is an abundant number, since it is smaller than the sum of its proper divisors (52908480).

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

23230440 is a wasteful number, since it uses less digits than its factorization.

23230440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 23230440 is about 4819.7966762095. The cubic root of 23230440 is about 285.3333127105. Note that the first 4 decimals are identical.

Adding to 23230440 its reverse (4403232), we get a palindrome (27633672).

The spelling of 23230440 in words is "twenty-three million, two hundred thirty thousand, four hundred forty".