12782889 has 24 divisors (see below), whose sum is σ = 21200192. Its totient is φ = 7270560.

The previous prime is 12782879. The next prime is 12782893. The reversal of 12782889 is 98828721.

It is a happy number.

It is not a de Polignac number, because 12782889 - 2⁴ = 12782873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12782879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20547 + ... + 21159.

Almost surely, 2^12782889 is an apocalyptic number.

It is an amenable number.

12782889 is a deficient number, since it is larger than the sum of its proper divisors (8417303).

12782889 is a wasteful number, since it uses less digits than its factorization.

12782889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 954 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 12782889 is about 3575.3166293351. The cubic root of 12782889 is about 233.8171374348.

The spelling of 12782889 in words is "twelve million, seven hundred eighty-two thousand, eight hundred eighty-nine".