116438778 has 48 divisors (see below), whose sum is σ = 260357760. Its totient is φ = 37581408.

The previous prime is 116438767. The next prime is 116438809. The reversal of 116438778 is 877834611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238851 + ... + 239337.

It is an arithmetic number, because the mean of its divisors is an integer number (5424120).

Almost surely, 2^116438778 is an apocalyptic number.

116438778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 116438778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130178880).

116438778 is an abundant number, since it is smaller than the sum of its proper divisors (143918982).

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

116438778 is a wasteful number, since it uses less digits than its factorization.

116438778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 888 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 116438778 is about 10790.6801453847. The cubic root of 116438778 is about 488.3140419046.

The spelling of 116438778 in words is "one hundred sixteen million, four hundred thirty-eight thousand, seven hundred seventy-eight".