16390386 has 12 divisors (see below), whose sum is σ = 35512542. Its totient is φ = 5463456.

The previous prime is 16390373. The next prime is 16390391. The reversal of 16390386 is 68309361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12852225 + 3538161 = 3585^2 + 1881^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16390386.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 455271 + ... + 455306.

Almost surely, 2^16390386 is an apocalyptic number.

16390386 is an abundant number, since it is smaller than the sum of its proper divisors (19122156).

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

16390386 is a wasteful number, since it uses less digits than its factorization.

16390386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910585 (or 910582 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 16390386 is about 4048.5041682083. The cubic root of 16390386 is about 254.0171625413.

The spelling of 16390386 in words is "sixteen million, three hundred ninety thousand, three hundred eighty-six".