118640190 has 32 divisors (see below), whose sum is σ = 286561440. Its totient is φ = 31434624.

The previous prime is 118640153. The next prime is 118640213. The reversal of 118640190 is 91046811.

It is a super-2 number, since 2×118640190² = 28150989366472200, 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, 7885 + ... + 17304.

It is an arithmetic number, because the mean of its divisors is an integer number (8955045).

Almost surely, 2^118640190 is an apocalyptic number.

118640190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118640190 is an abundant number, since it is smaller than the sum of its proper divisors (167921250).

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

118640190 is a wasteful number, since it uses less digits than its factorization.

118640190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25356.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 118640190 is about 10892.2077651870. The cubic root of 118640190 is about 491.3722329196.

The spelling of 118640190 in words is "one hundred eighteen million, six hundred forty thousand, one hundred ninety".