11939580 has 72 divisors (see below), whose sum is σ = 36599472. Its totient is φ = 3150336.

The previous prime is 11939563. The next prime is 11939621. The reversal of 11939580 is 8593911.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20047 + ... + 20633.

It is an arithmetic number, because the mean of its divisors is an integer number (508326).

Almost surely, 2^11939580 is an apocalyptic number.

11939580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11939580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18299736).

11939580 is an abundant number, since it is smaller than the sum of its proper divisors (24659892).

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

11939580 is a wasteful number, since it uses less digits than its factorization.

11939580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 11939580 is about 3455.3697341963. The cubic root of 11939580 is about 228.5579593998.

The spelling of 11939580 in words is "eleven million, nine hundred thirty-nine thousand, five hundred eighty".