23943240 has 48 divisors (see below), whose sum is σ = 77816700. Its totient is φ = 6384768.

The previous prime is 23943209. The next prime is 23943247. The reversal of 23943240 is 4234932.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23561316 + 381924 = 4854^2 + 618^2 .

It is not an unprimeable number, because it can be changed into a prime (23943247) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 32895 + ... + 33614.

Almost surely, 2^23943240 is an apocalyptic number.

23943240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23943240 is an abundant number, since it is smaller than the sum of its proper divisors (53873460).

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

23943240 is a wasteful number, since it uses less digits than its factorization.

23943240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66526 (or 66519 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 23943240 is about 4893.1830131316. The cubic root of 23943240 is about 288.2223398805. Note that the first 3 decimals are identical.

The spelling of 23943240 in words is "twenty-three million, nine hundred forty-three thousand, two hundred forty".