118081980 has 72 divisors (see below), whose sum is σ = 361928112. Its totient is φ = 31159296.

The previous prime is 118081973. The next prime is 118081987. The reversal of 118081980 is 89180811.

It is an interprime number because it is at equal distance from previous prime (118081973) and next prime (118081987).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118081987) 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, 14079 + ... + 20841.

Almost surely, 2^118081980 is an apocalyptic number.

118081980 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 118081980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180964056).

118081980 is an abundant number, since it is smaller than the sum of its proper divisors (243846132).

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

118081980 is a wasteful number, since it uses less digits than its factorization.

118081980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875 (or 6870 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 118081980 is about 10866.5532713920. The cubic root of 118081980 is about 490.6003747360.

The spelling of 118081980 in words is "one hundred eighteen million, eighty-one thousand, nine hundred eighty".