11571428 has 24 divisors (see below), whose sum is σ = 22179360. Its totient is φ = 5238720.

The previous prime is 11571419. The next prime is 11571433. The reversal of 11571428 is 82417511.

It is a self number, because there is not a number n which added to its sum of digits gives 11571428.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17675 + ... + 18317.

It is an arithmetic number, because the mean of its divisors is an integer number (924140).

Almost surely, 2^11571428 is an apocalyptic number.

It is an amenable number.

11571428 is a deficient number, since it is larger than the sum of its proper divisors (10607932).

11571428 is a wasteful number, since it uses less digits than its factorization.

11571428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067 (or 1065 counting only the distinct ones).

The product of its digits is 2240, while the sum is 29.

The square root of 11571428 is about 3401.6801730909. The cubic root of 11571428 is about 226.1842286155.

Adding to 11571428 its reverse (82417511), we get a palindrome (93988939).

The spelling of 11571428 in words is "eleven million, five hundred seventy-one thousand, four hundred twenty-eight".