1115990915 has 16 divisors (see below), whose sum is σ = 1456491456. Its totient is φ = 815952000.

The previous prime is 1115990881. The next prime is 1115990921. The reversal of 1115990915 is 5190995111.

It is not a de Polignac number, because 1115990915 - 2¹⁰ = 1115989891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78431 + ... + 91560.

It is an arithmetic number, because the mean of its divisors is an integer number (91030716).

Almost surely, 2^1115990915 is an apocalyptic number.

1115990915 is a deficient number, since it is larger than the sum of its proper divisors (340500541).

1115990915 is a wasteful number, since it uses less digits than its factorization.

1115990915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170110.

The product of its (nonzero) digits is 18225, while the sum is 41.

The square root of 1115990915 is about 33406.4502005227. The cubic root of 1115990915 is about 1037.2582228501.

The spelling of 1115990915 in words is "one billion, one hundred fifteen million, nine hundred ninety thousand, nine hundred fifteen".