118781892 has 72 divisors (see below), whose sum is σ = 307026720. Its totient is φ = 38712960.

The previous prime is 118781857. The next prime is 118781893. The reversal of 118781892 is 298187811.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (118781893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 419583 + ... + 419865.

It is an arithmetic number, because the mean of its divisors is an integer number (4264260).

Almost surely, 2^118781892 is an apocalyptic number.

118781892 is a gapful number since it is divisible by the number (12) 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 118781892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153513360).

118781892 is an abundant number, since it is smaller than the sum of its proper divisors (188244828).

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

118781892 is a wasteful number, since it uses less digits than its factorization.

118781892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 508 counting only the distinct ones).

The product of its digits is 64512, while the sum is 45.

The square root of 118781892 is about 10898.7105659339. The cubic root of 118781892 is about 491.5677842065.

The spelling of 118781892 in words is "one hundred eighteen million, seven hundred eighty-one thousand, eight hundred ninety-two".