11399128 has 32 divisors (see below), whose sum is σ = 23562000. Its totient is φ = 5136768.

The previous prime is 11399123. The next prime is 11399153. The reversal of 11399128 is 82199311.

It is a junction number, because it is equal to n+sod(n) for n = 11399093 and 11399102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11399123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3198 + ... + 5746.

Almost surely, 2^11399128 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 11399128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11781000).

11399128 is an abundant number, since it is smaller than the sum of its proper divisors (12162872).

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

11399128 is a wasteful number, since it uses less digits than its factorization.

11399128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611 (or 2607 counting only the distinct ones).

The product of its digits is 3888, while the sum is 34.

The square root of 11399128 is about 3376.2594687020. The cubic root of 11399128 is about 225.0559729058.

The spelling of 11399128 in words is "eleven million, three hundred ninety-nine thousand, one hundred twenty-eight".