118311090 has 16 divisors (see below), whose sum is σ = 283946688. Its totient is φ = 31549616.

The previous prime is 118311031. The next prime is 118311091. The reversal of 118311090 is 90113811.

It is a self number, because there is not a number n which added to its sum of digits gives 118311090.

It is not an unprimeable number, because it can be changed into a prime (118311091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1971822 + ... + 1971881.

It is an arithmetic number, because the mean of its divisors is an integer number (17746668).

Almost surely, 2^118311090 is an apocalyptic number.

118311090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118311090 is an abundant number, since it is smaller than the sum of its proper divisors (165635598).

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

118311090 is a wasteful number, since it uses less digits than its factorization.

118311090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943713.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 118311090 is about 10877.0901439677. The cubic root of 118311090 is about 490.9174675276.

It can be divided in two parts, 11831 and 1090, that added together give a palindrome (12921).

The spelling of 118311090 in words is "one hundred eighteen million, three hundred eleven thousand, ninety".