13031386 has 24 divisors (see below), whose sum is σ = 20803860. Its totient is φ = 6120576.

The previous prime is 13031383. The next prime is 13031393. The reversal of 13031386 is 68313031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12383361 + 648025 = 3519^2 + 805^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13031386.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115266 + ... + 115378.

Almost surely, 2^13031386 is an apocalyptic number.

13031386 is a deficient number, since it is larger than the sum of its proper divisors (7772474).

13031386 is a wasteful number, since it uses less digits than its factorization.

13031386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13031386 is about 3609.9011066787. The cubic root of 13031386 is about 235.3225448718.

The spelling of 13031386 in words is "thirteen million, thirty-one thousand, three hundred eighty-six".