13144986 has 12 divisors (see below), whose sum is σ = 28480842. Its totient is φ = 4381656.

The previous prime is 13144949. The next prime is 13144993. The reversal of 13144986 is 68944131.

13144986 is a `hidden beast` number, since 131 + 449 + 86 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 6095961 = 2655^2 + 2469^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13144986.

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 5 ways as a sum of consecutive naturals, for example, 365121 + ... + 365156.

Almost surely, 2^13144986 is an apocalyptic number.

13144986 is an abundant number, since it is smaller than the sum of its proper divisors (15335856).

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

13144986 is a wasteful number, since it uses less digits than its factorization.

13144986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730285 (or 730282 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 13144986 is about 3625.6014673430. The cubic root of 13144986 is about 236.0043688744.

The spelling of 13144986 in words is "thirteen million, one hundred forty-four thousand, nine hundred eighty-six".