16386642 has 12 divisors (see below), whose sum is σ = 35504430. Its totient is φ = 5462208.

The previous prime is 16386641. The next prime is 16386647. The reversal of 16386642 is 24668361.

16386642 is a `hidden beast` number, since 1 + 6 + 3 + 8 + 6 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11229201 + 5157441 = 3351^2 + 2271^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16386597 and 16386606.

It is not an unprimeable number, because it can be changed into a prime (16386641) by changing a digit.

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, 455167 + ... + 455202.

Almost surely, 2^16386642 is an apocalyptic number.

16386642 is an abundant number, since it is smaller than the sum of its proper divisors (19117788).

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

16386642 is a wasteful number, since it uses less digits than its factorization.

16386642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910377 (or 910374 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 16386642 is about 4048.0417487966. The cubic root of 16386642 is about 253.9978196436.

The spelling of 16386642 in words is "sixteen million, three hundred eighty-six thousand, six hundred forty-two".