23613240 has 64 divisors (see below), whose sum is σ = 80962560. Its totient is φ = 5397120.

The previous prime is 23613217. The next prime is 23613259. The reversal of 23613240 is 4231632.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13216 + ... + 14895.

It is an arithmetic number, because the mean of its divisors is an integer number (1265040).

Almost surely, 2^23613240 is an apocalyptic number.

23613240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23613240 is an abundant number, since it is smaller than the sum of its proper divisors (57349320).

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

23613240 is a wasteful number, since it uses less digits than its factorization.

23613240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28132 (or 28128 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 23613240 is about 4859.3456349595. The cubic root of 23613240 is about 286.8920587822.

Adding to 23613240 its reverse (4231632), we get a palindrome (27844872).

The spelling of 23613240 in words is "twenty-three million, six hundred thirteen thousand, two hundred forty".