11865516 has 48 divisors (see below), whose sum is σ = 31121664. Its totient is φ = 3491136.

The previous prime is 11865509. The next prime is 11865521. The reversal of 11865516 is 61556811.

11865516 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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, 1935 + ... + 5241.

It is an arithmetic number, because the mean of its divisors is an integer number (648368).

Almost surely, 2^11865516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11865516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15560832).

11865516 is an abundant number, since it is smaller than the sum of its proper divisors (19256148).

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

11865516 is a wasteful number, since it uses less digits than its factorization.

11865516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350 (or 3348 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

The square root of 11865516 is about 3444.6358298084. The cubic root of 11865516 is about 228.0843793565.

The spelling of 11865516 in words is "eleven million, eight hundred sixty-five thousand, five hundred sixteen".