118261980 has 72 divisors (see below), whose sum is σ = 360360000. Its totient is φ = 31393152.

The previous prime is 118261963. The next prime is 118261987. The reversal of 118261980 is 89162811.

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 (118261987) 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, 41646 + ... + 44394.

It is an arithmetic number, because the mean of its divisors is an integer number (5005000).

Almost surely, 2^118261980 is an apocalyptic number.

118261980 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 118261980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180180000).

118261980 is an abundant number, since it is smaller than the sum of its proper divisors (242098020).

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

118261980 is a wasteful number, since it uses less digits than its factorization.

118261980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003 (or 2998 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 118261980 is about 10874.8324125018. The cubic root of 118261980 is about 490.8495328045.

The spelling of 118261980 in words is "one hundred eighteen million, two hundred sixty-one thousand, nine hundred eighty".