118821980 has 12 divisors (see below), whose sum is σ = 249526200. Its totient is φ = 47528784.

The previous prime is 118821971. The next prime is 118822001. The reversal of 118821980 is 89128811.

It is a happy number.

It is a super-2 number, since 2×118821980² = 28237325862240800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2970530 + ... + 2970569.

It is an arithmetic number, because the mean of its divisors is an integer number (20793850).

Almost surely, 2^118821980 is an apocalyptic number.

118821980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118821980 is an abundant number, since it is smaller than the sum of its proper divisors (130704220).

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

118821980 is a wasteful number, since it uses less digits than its factorization.

118821980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941108 (or 5941106 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 118821980 is about 10900.5495274321. The cubic root of 118821980 is about 491.6230781365.

The spelling of 118821980 in words is "one hundred eighteen million, eight hundred twenty-one thousand, nine hundred eighty".