118731816 has 96 divisors (see below), whose sum is σ = 377495040. Its totient is φ = 33001344.

The previous prime is 118731797. The next prime is 118731827. The reversal of 118731816 is 618137811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

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, 15465 + ... + 21831.

It is an arithmetic number, because the mean of its divisors is an integer number (3932240).

Almost surely, 2^118731816 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 118731816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188747520).

118731816 is an abundant number, since it is smaller than the sum of its proper divisors (258763224).

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

118731816 is a wasteful number, since it uses less digits than its factorization.

118731816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6423 (or 6416 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 118731816 is about 10896.4129877680. The cubic root of 118731816 is about 491.4986962113.

It can be divided in two parts, 11873 and 1816, that added together give a square (13689 = 117²).

The spelling of 118731816 in words is "one hundred eighteen million, seven hundred thirty-one thousand, eight hundred sixteen".