11399544 has 96 divisors (see below), whose sum is σ = 35053200. Its totient is φ = 3317760.

The previous prime is 11399539. The next prime is 11399551. The reversal of 11399544 is 44599311.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 11399499 and 11399508.

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, 17464 + ... + 18104.

Almost surely, 2^11399544 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 11399544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17526600).

11399544 is an abundant number, since it is smaller than the sum of its proper divisors (23653656).

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

11399544 is a wasteful number, since it uses less digits than its factorization.

11399544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 678 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 11399544 is about 3376.3210747795. The cubic root of 11399544 is about 225.0587106049.

The spelling of 11399544 in words is "eleven million, three hundred ninety-nine thousand, five hundred forty-four".