11523540 has 48 divisors (see below), whose sum is σ = 36876672. Its totient is φ = 2633856.

The previous prime is 11523497. The next prime is 11523553. The reversal of 11523540 is 4532511.

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, 13299 + ... + 14138.

It is an arithmetic number, because the mean of its divisors is an integer number (768264).

Almost surely, 2^11523540 is an apocalyptic number.

11523540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11523540 is an abundant number, since it is smaller than the sum of its proper divisors (25353132).

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

11523540 is a wasteful number, since it uses less digits than its factorization.

11523540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27456 (or 27454 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 11523540 is about 3394.6340008902. The cubic root of 11523540 is about 225.8717783646.

The spelling of 11523540 in words is "eleven million, five hundred twenty-three thousand, five hundred forty".