23523540 has 24 divisors (see below), whose sum is σ = 65866080. Its totient is φ = 6272928.

The previous prime is 23523473. The next prime is 23523541. The reversal of 23523540 is 4532532.

It is a self number, because there is not a number n which added to its sum of digits gives 23523540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23523541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195970 + ... + 196089.

It is an arithmetic number, because the mean of its divisors is an integer number (2744420).

Almost surely, 2^23523540 is an apocalyptic number.

23523540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23523540 is an abundant number, since it is smaller than the sum of its proper divisors (42342540).

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

23523540 is a wasteful number, since it uses less digits than its factorization.

23523540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392071 (or 392069 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 23523540 is about 4850.1072153098. The cubic root of 23523540 is about 286.5283239695.

The spelling of 23523540 in words is "twenty-three million, five hundred twenty-three thousand, five hundred forty".