11289915 has 64 divisors (see below), whose sum is σ = 24729600. Its totient is φ = 4758912.

The previous prime is 11289911. The next prime is 11289937. The reversal of 11289915 is 51998211.

11289915 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11289915 - 2² = 11289911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11289915.

It is not an unprimeable number, because it can be changed into a prime (11289911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11826 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (386400).

Almost surely, 2^11289915 is an apocalyptic number.

11289915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11289915 is an abundant number, since it is smaller than the sum of its proper divisors (13439685).

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

11289915 is a wasteful number, since it uses less digits than its factorization.

11289915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 947 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 11289915 is about 3360.0468746730. The cubic root of 11289915 is about 224.3349249377.

The spelling of 11289915 in words is "eleven million, two hundred eighty-nine thousand, nine hundred fifteen".