12017990 has 32 divisors (see below), whose sum is σ = 22281696. Its totient is φ = 4665600.

The previous prime is 12017989. The next prime is 12018001. The reversal of 12017990 is 9971021.

12017990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 73649 + ... + 73811.

It is an arithmetic number, because the mean of its divisors is an integer number (696303).

Almost surely, 2^12017990 is an apocalyptic number.

12017990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12017990 is a deficient number, since it is larger than the sum of its proper divisors (10263706).

12017990 is a wasteful number, since it uses less digits than its factorization.

12017990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 12017990 is about 3466.6972755059. The cubic root of 12017990 is about 229.0571992151.

The spelling of 12017990 in words is "twelve million, seventeen thousand, nine hundred ninety".