23512240 has 40 divisors (see below), whose sum is σ = 55340208. Its totient is φ = 9288960.

The previous prime is 23512219. The next prime is 23512259. The reversal of 23512240 is 4221532.

It is a tau number, because it is divible by the number of its divisors (40).

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, 4870 + ... + 8410.

Almost surely, 2^23512240 is an apocalyptic number.

23512240 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 23512240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27670104).

23512240 is an abundant number, since it is smaller than the sum of its proper divisors (31827968).

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

23512240 is a wasteful number, since it uses less digits than its factorization.

23512240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3631 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 23512240 is about 4848.9421526762. The cubic root of 23512240 is about 286.4824367626.

Adding to 23512240 its reverse (4221532), we get a palindrome (27733772).

The spelling of 23512240 in words is "twenty-three million, five hundred twelve thousand, two hundred forty".