11398644 has 48 divisors (see below), whose sum is σ = 29939840. Its totient is φ = 3796632.

The previous prime is 11398637. The next prime is 11398679. The reversal of 11398644 is 44689311.

11398644 is a `hidden beast` number, since 1 + 1 + 3 + 9 + 8 + 644 = 666.

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 = 11398599 and 11398608.

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, 8097 + ... + 9399.

Almost surely, 2^11398644 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 11398644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14969920).

11398644 is an abundant number, since it is smaller than the sum of its proper divisors (18541196).

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

11398644 is an equidigital number, since it uses as much as digits as its factorization.

11398644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328 (or 1308 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 11398644 is about 3376.1877909856. The cubic root of 11398644 is about 225.0527876144.

The spelling of 11398644 in words is "eleven million, three hundred ninety-eight thousand, six hundred forty-four".