1115991424 has 32 divisors (see below), whose sum is σ = 2228396040. Its totient is φ = 556707840.

The previous prime is 1115991397. The next prime is 1115991433. The reversal of 1115991424 is 4241995111.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46864 + ... + 66544.

Almost surely, 2^1115991424 is an apocalyptic number.

It is an amenable number.

1115991424 is a deficient number, since it is larger than the sum of its proper divisors (1112404616).

1115991424 is an equidigital number, since it uses as much as digits as its factorization.

1115991424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20138 (or 20126 counting only the distinct ones).

The product of its digits is 12960, while the sum is 37.

The square root of 1115991424 is about 33406.4578188110. The cubic root of 1115991424 is about 1037.2583805468.

The spelling of 1115991424 in words is "one billion, one hundred fifteen million, nine hundred ninety-one thousand, four hundred twenty-four".