12118890 has 32 divisors (see below), whose sum is σ = 33240960. Its totient is φ = 2769984.

The previous prime is 12118871. The next prime is 12118891. The reversal of 12118890 is 9881121.

It is a super-3 number, since 3×12118890³ (a number of 22 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12118891) 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, 28645 + ... + 29064.

It is an arithmetic number, because the mean of its divisors is an integer number (1038780).

Almost surely, 2^12118890 is an apocalyptic number.

12118890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12118890 is an abundant number, since it is smaller than the sum of its proper divisors (21122070).

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

12118890 is a wasteful number, since it uses less digits than its factorization.

12118890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57726.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 12118890 is about 3481.2196138710. The cubic root of 12118890 is about 229.6964489549.

It can be divided in two parts, 121188 and 90, that added together give a triangular number (121278 = T₄₉₂).

The spelling of 12118890 in words is "twelve million, one hundred eighteen thousand, eight hundred ninety".