12889808 has 20 divisors (see below), whose sum is σ = 26443620. Its totient is φ = 6065664.

The previous prime is 12889787. The next prime is 12889819. The reversal of 12889808 is 80898821.

It can be written as a sum of positive squares in 2 ways, for example, as 4293184 + 8596624 = 2072^2 + 2932^2 .

It is a super-2 number, since 2×12889808² = 332294300553728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23423 + ... + 23966.

It is an arithmetic number, because the mean of its divisors is an integer number (1322181).

Almost surely, 2^12889808 is an apocalyptic number.

It is an amenable number.

12889808 is an abundant number, since it is smaller than the sum of its proper divisors (13553812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12889808 is a wasteful number, since it uses less digits than its factorization.

12889808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47414 (or 47408 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 44.

The square root of 12889808 is about 3590.2378751275. The cubic root of 12889808 is about 234.4672282479.

The spelling of 12889808 in words is "twelve million, eight hundred eighty-nine thousand, eight hundred eight".