1115981910 has 48 divisors (see below), whose sum is σ = 3054270960. Its totient is φ = 281931840.

The previous prime is 1115981849. The next prime is 1115981921. The reversal of 1115981910 is 191895111.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324601 + ... + 328020.

It is an arithmetic number, because the mean of its divisors is an integer number (63630645).

Almost surely, 2^1115981910 is an apocalyptic number.

1115981910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1115981910 is an abundant number, since it is smaller than the sum of its proper divisors (1938289050).

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

1115981910 is a wasteful number, since it uses less digits than its factorization.

1115981910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652653 (or 652650 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 36.

The square root of 1115981910 is about 33406.3154208901. The cubic root of 1115981910 is about 1037.2554329423.

The spelling of 1115981910 in words is "one billion, one hundred fifteen million, nine hundred eighty-one thousand, nine hundred ten".