13399386 has 128 divisors (see below), whose sum is σ = 37933056. Its totient is φ = 3041280.

The previous prime is 13399361. The next prime is 13399387. The reversal of 13399386 is 68399331.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13399387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138090 + ... + 138186.

It is an arithmetic number, because the mean of its divisors is an integer number (296352).

Almost surely, 2^13399386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13399386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18966528).

13399386 is an abundant number, since it is smaller than the sum of its proper divisors (24533670).

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

13399386 is a wasteful number, since it uses less digits than its factorization.

13399386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its digits is 104976, while the sum is 42.

The square root of 13399386 is about 3660.5171765749. The cubic root of 13399386 is about 237.5171459459.

Subtracting 13399386 from its reverse (68399331), we obtain a palindrome (54999945).

The spelling of 13399386 in words is "thirteen million, three hundred ninety-nine thousand, three hundred eighty-six".