11428091 has 4 divisors (see below), whose sum is σ = 11434872. Its totient is φ = 11421312.

The previous prime is 11428069. The next prime is 11428111. The reversal of 11428091 is 19082411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19082411 = 43 ⋅443777.

It is a cyclic number.

It is not a de Polignac number, because 11428091 - 2¹⁴ = 11411707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11428091.

It is not an unprimeable number, because it can be changed into a prime (11428051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316 + ... + 4958.

It is an arithmetic number, because the mean of its divisors is an integer number (2858718).

Almost surely, 2^11428091 is an apocalyptic number.

11428091 is a deficient number, since it is larger than the sum of its proper divisors (6781).

11428091 is an equidigital number, since it uses as much as digits as its factorization.

11428091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 11428091 is about 3380.5459618233. The cubic root of 11428091 is about 225.2464197348.

The spelling of 11428091 in words is "eleven million, four hundred twenty-eight thousand, ninety-one".