11539920 has 80 divisors (see below), whose sum is σ = 40890240. Its totient is φ = 2637312.

The previous prime is 11539909. The next prime is 11539937. The reversal of 11539920 is 2993511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 1755 + ... + 5114.

It is an arithmetic number, because the mean of its divisors is an integer number (511128).

Almost surely, 2^11539920 is an apocalyptic number.

11539920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11539920 is an abundant number, since it is smaller than the sum of its proper divisors (29350320).

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

11539920 is a wasteful number, since it uses less digits than its factorization.

11539920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6892 (or 6886 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 11539920 is about 3397.0457753760. The cubic root of 11539920 is about 225.9787486217.

The spelling of 11539920 in words is "eleven million, five hundred thirty-nine thousand, nine hundred twenty".