11815884 has 72 divisors (see below), whose sum is σ = 32432400. Its totient is φ = 3612672.

The previous prime is 11815879. The next prime is 11815939. The reversal of 11815884 is 48851811.

It is a happy number.

11815884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11815884² = 279230229402912, which contains 22 as substring.

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

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, 26092 + ... + 26540.

It is an arithmetic number, because the mean of its divisors is an integer number (450450).

Almost surely, 2^11815884 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 11815884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16216200).

11815884 is an abundant number, since it is smaller than the sum of its proper divisors (20616516).

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

11815884 is a wasteful number, since it uses less digits than its factorization.

11815884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 514 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 11815884 is about 3437.4240355243. The cubic root of 11815884 is about 227.7659185753.

The spelling of 11815884 in words is "eleven million, eight hundred fifteen thousand, eight hundred eighty-four".