16386220 has 12 divisors (see below), whose sum is σ = 34411104. Its totient is φ = 6554480.

The previous prime is 16386217. The next prime is 16386233. The reversal of 16386220 is 2268361.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 409636 + ... + 409675.

It is an arithmetic number, because the mean of its divisors is an integer number (2867592).

Almost surely, 2^16386220 is an apocalyptic number.

16386220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16386220 is an abundant number, since it is smaller than the sum of its proper divisors (18024884).

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

16386220 is a wasteful number, since it uses less digits than its factorization.

16386220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819320 (or 819318 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16386220 is about 4047.9896244926. The cubic root of 16386220 is about 253.9956392497.

The spelling of 16386220 in words is "sixteen million, three hundred eighty-six thousand, two hundred twenty".