12989870 has 32 divisors (see below), whose sum is σ = 25347168. Its totient is φ = 4773888.

The previous prime is 12989861. The next prime is 12989881. The reversal of 12989870 is 7898921.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6422 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (792099).

Almost surely, 2^12989870 is an apocalyptic number.

12989870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12989870 is a deficient number, since it is larger than the sum of its proper divisors (12357298).

12989870 is a wasteful number, since it uses less digits than its factorization.

12989870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 12989870 is about 3604.1462234488. The cubic root of 12989870 is about 235.0723784903.

The spelling of 12989870 in words is "twelve million, nine hundred eighty-nine thousand, eight hundred seventy".