118721280 has 144 divisors (see below), whose sum is σ = 388523520. Its totient is φ = 30879744.

The previous prime is 118721269. The next prime is 118721297. The reversal of 118721280 is 82127811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164761 + ... + 165479.

It is an arithmetic number, because the mean of its divisors is an integer number (2698080).

Almost surely, 2^118721280 is an apocalyptic number.

118721280 is a gapful number since it is divisible by the number (10) 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 118721280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194261760).

118721280 is an abundant number, since it is smaller than the sum of its proper divisors (269802240).

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

118721280 is an equidigital number, since it uses as much as digits as its factorization.

118721280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 118721280 is about 10895.9295151905. The cubic root of 118721280 is about 491.4841576104.

The spelling of 118721280 in words is "one hundred eighteen million, seven hundred twenty-one thousand, two hundred eighty".