12831990 has 16 divisors (see below), whose sum is σ = 30796848. Its totient is φ = 3421856.

The previous prime is 12831983. The next prime is 12832003. The reversal of 12831990 is 9913821.

It is a congruent number.

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, 213837 + ... + 213896.

It is an arithmetic number, because the mean of its divisors is an integer number (1924803).

Almost surely, 2^12831990 is an apocalyptic number.

12831990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12831990 is an abundant number, since it is smaller than the sum of its proper divisors (17964858).

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

12831990 is a wasteful number, since it uses less digits than its factorization.

12831990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427743.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12831990 is about 3582.1767125590. The cubic root of 12831990 is about 234.1161305370.

The spelling of 12831990 in words is "twelve million, eight hundred thirty-one thousand, nine hundred ninety".