12085890 has 16 divisors (see below), whose sum is σ = 29006208. Its totient is φ = 3222896.

The previous prime is 12085883. The next prime is 12085897. The reversal of 12085890 is 9858021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12085883) and next prime (12085897).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12085897) 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, 201402 + ... + 201461.

It is an arithmetic number, because the mean of its divisors is an integer number (1812888).

Almost surely, 2^12085890 is an apocalyptic number.

12085890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12085890 is an abundant number, since it is smaller than the sum of its proper divisors (16920318).

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

12085890 is a wasteful number, since it uses less digits than its factorization.

12085890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402873.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 12085890 is about 3476.4766646707. The cubic root of 12085890 is about 229.4877699588.

The spelling of 12085890 in words is "twelve million, eighty-five thousand, eight hundred ninety".