23231240 has 32 divisors (see below), whose sum is σ = 53132760. Its totient is φ = 9139200.

The previous prime is 23231237. The next prime is 23231267. The reversal of 23231240 is 4213232.

It can be written as a sum of positive squares in 4 ways, for example, as 11383876 + 11847364 = 3374^2 + 3442^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2321 + ... + 7200.

Almost surely, 2^23231240 is an apocalyptic number.

23231240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23231240 is an abundant number, since it is smaller than the sum of its proper divisors (29901520).

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

23231240 is a wasteful number, since it uses less digits than its factorization.

23231240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9593 (or 9589 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 23231240 is about 4819.8796665477. The cubic root of 23231240 is about 285.3365880686.

Adding to 23231240 its reverse (4213232), we get a palindrome (27444472).

The spelling of 23231240 in words is "twenty-three million, two hundred thirty-one thousand, two hundred forty".