11288815 has 4 divisors (see below), whose sum is σ = 13546584. Its totient is φ = 9031048.

The previous prime is 11288807. The next prime is 11288819. The reversal of 11288815 is 51888211.

11288815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51888211 = 2213 ⋅23447.

It is a cyclic number.

It is not a de Polignac number, because 11288815 - 2³ = 11288807 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 (11288819) 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, 1128877 + ... + 1128886.

It is an arithmetic number, because the mean of its divisors is an integer number (3386646).

Almost surely, 2^11288815 is an apocalyptic number.

11288815 is a deficient number, since it is larger than the sum of its proper divisors (2257769).

11288815 is an equidigital number, since it uses as much as digits as its factorization.

11288815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257768.

The product of its digits is 5120, while the sum is 34.

The square root of 11288815 is about 3359.8831824931. The cubic root of 11288815 is about 224.3276388943.

The spelling of 11288815 in words is "eleven million, two hundred eighty-eight thousand, eight hundred fifteen".