12311890 has 16 divisors (see below), whose sum is σ = 22702680. Its totient is φ = 4804480.

The previous prime is 12311881. The next prime is 12311911. The reversal of 12311890 is 9811321.

It can be written as a sum of positive squares in 4 ways, for example, as 10349089 + 1962801 = 3217^2 + 1401^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14605 + ... + 15424.

Almost surely, 2^12311890 is an apocalyptic number.

12311890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12311890 is a deficient number, since it is larger than the sum of its proper divisors (10390790).

12311890 is a wasteful number, since it uses less digits than its factorization.

12311890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30077.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 12311890 is about 3508.8302894269. The cubic root of 12311890 is about 230.9093801957.

The spelling of 12311890 in words is "twelve million, three hundred eleven thousand, eight hundred ninety".