118491930 has 64 divisors (see below), whose sum is σ = 319593600. Its totient is φ = 31236480.

The previous prime is 118491881. The next prime is 118491931. The reversal of 118491930 is 39194811.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (118491931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21565 + ... + 26495.

It is an arithmetic number, because the mean of its divisors is an integer number (4993650).

Almost surely, 2^118491930 is an apocalyptic number.

118491930 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 118491930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159796800).

118491930 is an abundant number, since it is smaller than the sum of its proper divisors (201101670).

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

118491930 is a wasteful number, since it uses less digits than its factorization.

118491930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036 (or 5030 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 118491930 is about 10885.3998548515. The cubic root of 118491930 is about 491.1674647191.

The spelling of 118491930 in words is "one hundred eighteen million, four hundred ninety-one thousand, nine hundred thirty".