118978830 has 48 divisors (see below), whose sum is σ = 312109200. Its totient is φ = 31444224.

The previous prime is 118978829. The next prime is 118978859. The reversal of 118978830 is 38879811.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 4321 + ... + 16019.

It is an arithmetic number, because the mean of its divisors is an integer number (6502275).

Almost surely, 2^118978830 is an apocalyptic number.

118978830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 118978830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156054600).

118978830 is an abundant number, since it is smaller than the sum of its proper divisors (193130370).

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

118978830 is a wasteful number, since it uses less digits than its factorization.

118978830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11825 (or 11822 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 118978830 is about 10907.7417461178. The cubic root of 118978830 is about 491.8393040534.

The spelling of 118978830 in words is "one hundred eighteen million, nine hundred seventy-eight thousand, eight hundred thirty".