118221730 has 32 divisors (see below), whose sum is σ = 234223488. Its totient is φ = 42604800.

The previous prime is 118221713. The next prime is 118221739. The reversal of 118221730 is 37122811.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 118221695 and 118221704.

It is not an unprimeable number, because it can be changed into a prime (118221739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7675 + ... + 17185.

It is an arithmetic number, because the mean of its divisors is an integer number (7319484).

Almost surely, 2^118221730 is an apocalyptic number.

118221730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118221730 is a deficient number, since it is larger than the sum of its proper divisors (116001758).

118221730 is a wasteful number, since it uses less digits than its factorization.

118221730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 118221730 is about 10872.9816517826. The cubic root of 118221730 is about 490.7938402495.

The spelling of 118221730 in words is "one hundred eighteen million, two hundred twenty-one thousand, seven hundred thirty".