12985998 has 16 divisors (see below), whose sum is σ = 26044416. Its totient is φ = 4316600.

The previous prime is 12985991. The next prime is 12986003. The reversal of 12985998 is 89958921.

It is a super-2 number, since 2×12985998² = 337272288112008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12985998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12985991) 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 7 ways as a sum of consecutive naturals, for example, 528 + ... + 5123.

It is an arithmetic number, because the mean of its divisors is an integer number (1627776).

Almost surely, 2^12985998 is an apocalyptic number.

12985998 is an abundant number, since it is smaller than the sum of its proper divisors (13058418).

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

12985998 is a wasteful number, since it uses less digits than its factorization.

12985998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039.

The product of its digits is 466560, while the sum is 51.

The square root of 12985998 is about 3603.6090242977. The cubic root of 12985998 is about 235.0490195010.

The spelling of 12985998 in words is "twelve million, nine hundred eighty-five thousand, nine hundred ninety-eight".