16386138 has 20 divisors (see below), whose sum is σ = 36717450. Its totient is φ = 5461992.

The previous prime is 16386137. The next prime is 16386163. The reversal of 16386138 is 83168361.

16386138 is a `hidden beast` number, since 1 + 6 + 38 + 613 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8450649 + 7935489 = 2907^2 + 2817^2 .

It is not an unprimeable number, because it can be changed into a prime (16386137) 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 9 ways as a sum of consecutive naturals, for example, 50413 + ... + 50736.

Almost surely, 2^16386138 is an apocalyptic number.

16386138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16386138 is an abundant number, since it is smaller than the sum of its proper divisors (20331312).

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

16386138 is a wasteful number, since it uses less digits than its factorization.

16386138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101163 (or 101154 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16386138 is about 4047.9794959955. The cubic root of 16386138 is about 253.9952155670.

It can be divided in two parts, 1638 and 6138, that added together give a 5-th power (7776 = 6⁵).

The spelling of 16386138 in words is "sixteen million, three hundred eighty-six thousand, one hundred thirty-eight".