1115985216 has 56 divisors (see below), whose sum is σ = 3108126880. Its totient is φ = 352415232.

The previous prime is 1115985193. The next prime is 1115985253. The reversal of 1115985216 is 6125895111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149311 + ... + 156606.

Almost surely, 2^1115985216 is an apocalyptic number.

1115985216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1115985216 is an abundant number, since it is smaller than the sum of its proper divisors (1992141664).

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

1115985216 is a wasteful number, since it uses less digits than its factorization.

1115985216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305951 (or 305941 counting only the distinct ones).

The product of its digits is 21600, while the sum is 39.

The square root of 1115985216 is about 33406.3649025152. The cubic root of 1115985216 is about 1037.2564572011.

The spelling of 1115985216 in words is "one billion, one hundred fifteen million, nine hundred eighty-five thousand, two hundred sixteen".