12097890 has 128 divisors (see below), whose sum is σ = 38085120. Its totient is φ = 2674944.

The previous prime is 12097879. The next prime is 12097909. The reversal of 12097890 is 9879021.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69844 + ... + 70016.

It is an arithmetic number, because the mean of its divisors is an integer number (297540).

Almost surely, 2^12097890 is an apocalyptic number.

12097890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12097890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19042560).

12097890 is an abundant number, since it is smaller than the sum of its proper divisors (25987230).

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

12097890 is a wasteful number, since it uses less digits than its factorization.

12097890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 12097890 is about 3478.2021217865. The cubic root of 12097890 is about 229.5636971299.

The spelling of 12097890 in words is "twelve million, ninety-seven thousand, eight hundred ninety".