16138216 has 16 divisors (see below), whose sum is σ = 31077540. Its totient is φ = 7850880.

The previous prime is 16138169. The next prime is 16138217. The reversal of 16138216 is 61283161.

It can be written as a sum of positive squares in 2 ways, for example, as 15634116 + 504100 = 3954^2 + 710^2 .

It is not an unprimeable number, because it can be changed into a prime (16138217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26965 + ... + 27556.

Almost surely, 2^16138216 is an apocalyptic number.

It is an amenable number.

16138216 is a deficient number, since it is larger than the sum of its proper divisors (14939324).

16138216 is a wasteful number, since it uses less digits than its factorization.

16138216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54564 (or 54560 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 16138216 is about 4017.2398484532. The cubic root of 16138216 is about 252.7077191491.

The spelling of 16138216 in words is "sixteen million, one hundred thirty-eight thousand, two hundred sixteen".