916138188 has 144 divisors (see below), whose sum is σ = 2839898880. Its totient is φ = 252673344.

The previous prime is 916138187. The next prime is 916138193. The reversal of 916138188 is 881831619.

916138188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (916138183) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194995 + ... + 199637.

It is an arithmetic number, because the mean of its divisors is an integer number (19721520).

Almost surely, 2^916138188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 916138188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419949440).

916138188 is an abundant number, since it is smaller than the sum of its proper divisors (1923760692).

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

916138188 is a wasteful number, since it uses less digits than its factorization.

916138188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698 (or 4684 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 916138188 is about 30267.7747447677. The cubic root of 916138188 is about 971.2260643167.

The spelling of 916138188 in words is "nine hundred sixteen million, one hundred thirty-eight thousand, one hundred eighty-eight".