16387266 has 48 divisors (see below), whose sum is σ = 38495520. Its totient is φ = 4636800.

The previous prime is 16387243. The next prime is 16387289. The reversal of 16387266 is 66278361.

It is an interprime number because it is at equal distance from previous prime (16387243) and next prime (16387289).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 40666 + ... + 41066.

It is an arithmetic number, because the mean of its divisors is an integer number (801990).

Almost surely, 2^16387266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16387266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19247760).

16387266 is an abundant number, since it is smaller than the sum of its proper divisors (22108254).

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

16387266 is a wasteful number, since it uses less digits than its factorization.

16387266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 552 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 16387266 is about 4048.1188223668. The cubic root of 16387266 is about 254.0010436645.

It can be divided in two parts, 16387 and 266, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 16387266 in words is "sixteen million, three hundred eighty-seven thousand, two hundred sixty-six".