118391730 has 16 divisors (see below), whose sum is σ = 284140224. Its totient is φ = 31571120.

The previous prime is 118391687. The next prime is 118391743. The reversal of 118391730 is 37193811.

It is a junction number, because it is equal to n+sod(n) for n = 118391691 and 118391700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1973166 + ... + 1973225.

It is an arithmetic number, because the mean of its divisors is an integer number (17758764).

Almost surely, 2^118391730 is an apocalyptic number.

118391730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118391730 is an abundant number, since it is smaller than the sum of its proper divisors (165748494).

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

118391730 is a wasteful number, since it uses less digits than its factorization.

118391730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946401.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 118391730 is about 10880.7963862945. The cubic root of 118391730 is about 491.0289774849.

The spelling of 118391730 in words is "one hundred eighteen million, three hundred ninety-one thousand, seven hundred thirty".