118081830 has 32 divisors (see below), whose sum is σ = 300068064. Its totient is φ = 29636096.

The previous prime is 118081829. The next prime is 118081841. The reversal of 118081830 is 38180811.

It is a super-2 number, since 2×118081830² = 27886637152297800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115257 + ... + 116276.

It is an arithmetic number, because the mean of its divisors is an integer number (9377127).

Almost surely, 2^118081830 is an apocalyptic number.

118081830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118081830 is an abundant number, since it is smaller than the sum of its proper divisors (181986234).

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

118081830 is a wasteful number, since it uses less digits than its factorization.

118081830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231560.

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 118081830 is about 10866.5463694773. The cubic root of 118081830 is about 490.6001669987.

The spelling of 118081830 in words is "one hundred eighteen million, eighty-one thousand, eight hundred thirty".