116991056 has 80 divisors (see below), whose sum is σ = 293731200. Its totient is φ = 43835904.

The previous prime is 116991029. The next prime is 116991067. The reversal of 116991056 is 650199611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent 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, 25550 + ... + 29778.

It is an arithmetic number, because the mean of its divisors is an integer number (3671640).

Almost surely, 2^116991056 is an apocalyptic number.

116991056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 116991056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146865600).

116991056 is an abundant number, since it is smaller than the sum of its proper divisors (176740144).

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

116991056 is a wasteful number, since it uses less digits than its factorization.

116991056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276 (or 4270 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 116991056 is about 10816.2403819442. The cubic root of 116991056 is about 489.0848614089.

The spelling of 116991056 in words is "one hundred sixteen million, nine hundred ninety-one thousand, fifty-six".