11523580 has 12 divisors (see below), whose sum is σ = 24199560. Its totient is φ = 4609424.

The previous prime is 11523559. The next prime is 11523581. The reversal of 11523580 is 8532511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288070 + ... + 288109.

It is an arithmetic number, because the mean of its divisors is an integer number (2016630).

Almost surely, 2^11523580 is an apocalyptic number.

11523580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11523580 is an abundant number, since it is smaller than the sum of its proper divisors (12675980).

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

11523580 is a wasteful number, since it uses less digits than its factorization.

11523580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576188 (or 576186 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 11523580 is about 3394.6398925365. The cubic root of 11523580 is about 225.8720397097.

The spelling of 11523580 in words is "eleven million, five hundred twenty-three thousand, five hundred eighty".