12231890 has 32 divisors (see below), whose sum is σ = 24243840. Its totient is φ = 4443120.

The previous prime is 12231889. The next prime is 12231917. The reversal of 12231890 is 9813221.

12231890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 12851 + ... + 13769.

It is an arithmetic number, because the mean of its divisors is an integer number (757620).

Almost surely, 2^12231890 is an apocalyptic number.

12231890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12231890 is a deficient number, since it is larger than the sum of its proper divisors (12011950).

12231890 is an equidigital number, since it uses as much as digits as its factorization.

12231890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12231890 is about 3497.4119002485. The cubic root of 12231890 is about 230.4081599356.

It can be divided in two parts, 1223 and 1890, that added together give a palindrome (3113).

The spelling of 12231890 in words is "twelve million, two hundred thirty-one thousand, eight hundred ninety".