12899878 has 8 divisors (see below), whose sum is σ = 19677960. Its totient is φ = 6340560.

The previous prime is 12899869. The next prime is 12899893. The reversal of 12899878 is 87899821.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 54543 + ... + 54778.

It is an arithmetic number, because the mean of its divisors is an integer number (2459745).

Almost surely, 2^12899878 is an apocalyptic number.

12899878 is a deficient number, since it is larger than the sum of its proper divisors (6778082).

12899878 is a wasteful number, since it uses less digits than its factorization.

12899878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109382.

The product of its digits is 580608, while the sum is 52.

The square root of 12899878 is about 3591.6400153690. The cubic root of 12899878 is about 234.5282705433.

The spelling of 12899878 in words is "twelve million, eight hundred ninety-nine thousand, eight hundred seventy-eight".