12989890 has 8 divisors (see below), whose sum is σ = 23381820. Its totient is φ = 5195952.

The previous prime is 12989881. The next prime is 12989897. The reversal of 12989890 is 9898921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12981609 + 8281 = 3603^2 + 91^2 .

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 12989890.

It is not an unprimeable number, because it can be changed into a prime (12989897) by changing a digit.

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, 649485 + ... + 649504.

Almost surely, 2^12989890 is an apocalyptic number.

12989890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12989890 is a deficient number, since it is larger than the sum of its proper divisors (10391930).

12989890 is a wasteful number, since it uses less digits than its factorization.

12989890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298996.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 12989890 is about 3604.1489980299. The cubic root of 12989890 is about 235.0724991342.

The spelling of 12989890 in words is "twelve million, nine hundred eighty-nine thousand, eight hundred ninety".