12890385 has 12 divisors (see below), whose sum is σ = 22343412. Its totient is φ = 6874848.

The previous prime is 12890363. The next prime is 12890387. The reversal of 12890385 is 58309821.

It can be written as a sum of positive squares in 2 ways, for example, as 5089536 + 7800849 = 2256^2 + 2793^2 .

It is not a de Polignac number, because 12890385 - 2⁶ = 12890321 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12890387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143182 + ... + 143271.

It is an arithmetic number, because the mean of its divisors is an integer number (1861951).

Almost surely, 2^12890385 is an apocalyptic number.

12890385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12890385 is a deficient number, since it is larger than the sum of its proper divisors (9453027).

12890385 is a wasteful number, since it uses less digits than its factorization.

12890385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286464 (or 286461 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 12890385 is about 3590.3182310208. The cubic root of 12890385 is about 234.4707267633.

The spelling of 12890385 in words is "twelve million, eight hundred ninety thousand, three hundred eighty-five".