12738986 has 8 divisors (see below), whose sum is σ = 20578404. Its totient is φ = 5879520.

The previous prime is 12738983. The next prime is 12738991. The reversal of 12738986 is 68983721.

It can be written as a sum of positive squares in 2 ways, for example, as 12737761 + 1225 = 3569^2 + 35^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12738983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244955 + ... + 245006.

Almost surely, 2^12738986 is an apocalyptic number.

12738986 is a deficient number, since it is larger than the sum of its proper divisors (7839418).

12738986 is a wasteful number, since it uses less digits than its factorization.

12738986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489976.

The product of its digits is 145152, while the sum is 44.

The square root of 12738986 is about 3569.1716125734. The cubic root of 12738986 is about 233.5491477200.

The spelling of 12738986 in words is "twelve million, seven hundred thirty-eight thousand, nine hundred eighty-six".