12805690 has 16 divisors (see below), whose sum is σ = 23093280. Its totient is φ = 5112720.

The previous prime is 12805679. The next prime is 12805691. The reversal of 12805690 is 9650821.

12805690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12805690² = 327971392752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12805691) 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, 7321 + ... + 8899.

It is an arithmetic number, because the mean of its divisors is an integer number (1443330).

Almost surely, 2^12805690 is an apocalyptic number.

12805690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12805690 is a deficient number, since it is larger than the sum of its proper divisors (10287590).

12805690 is a wasteful number, since it uses less digits than its factorization.

12805690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 12805690 is about 3578.5038773208. The cubic root of 12805690 is about 233.9560757158.

The spelling of 12805690 in words is "twelve million, eight hundred five thousand, six hundred ninety".