12890818 has 4 divisors (see below), whose sum is σ = 19336230. Its totient is φ = 6445408.

The previous prime is 12890809. The next prime is 12890821. The reversal of 12890818 is 81809821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10738729 + 2152089 = 3277^2 + 1467^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222703 + ... + 3222706.

Almost surely, 2^12890818 is an apocalyptic number.

12890818 is a deficient number, since it is larger than the sum of its proper divisors (6445412).

12890818 is an equidigital number, since it uses as much as digits as its factorization.

12890818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6445411.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 12890818 is about 3590.3785315757. The cubic root of 12890818 is about 234.4733520970.

The spelling of 12890818 in words is "twelve million, eight hundred ninety thousand, eight hundred eighteen".