11428391 has 8 divisors (see below), whose sum is σ = 12492144. Its totient is φ = 10391040.

The previous prime is 11428363. The next prime is 11428409. The reversal of 11428391 is 19382411.

11428391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11428391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11428331) 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, 5690 + ... + 7431.

It is an arithmetic number, because the mean of its divisors is an integer number (1561518).

Almost surely, 2^11428391 is an apocalyptic number.

11428391 is a deficient number, since it is larger than the sum of its proper divisors (1063753).

11428391 is a wasteful number, since it uses less digits than its factorization.

11428391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13201.

The product of its digits is 1728, while the sum is 29.

The square root of 11428391 is about 3380.5903330631. The cubic root of 11428391 is about 225.2483907066.

The spelling of 11428391 in words is "eleven million, four hundred twenty-eight thousand, three hundred ninety-one".