16886381 has 8 divisors (see below), whose sum is σ = 17626680. Its totient is φ = 16156672.

The previous prime is 16886377. The next prime is 16886407. The reversal of 16886381 is 18368861.

It can be written as a sum of positive squares in 4 ways, for example, as 354025 + 16532356 = 595^2 + 4066^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16886381 - 2² = 16886377 is a prime.

It is a super-2 number, since 2×16886381² = 570299726554322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16886341) 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 7 ways as a sum of consecutive naturals, for example, 701 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (2203335).

Almost surely, 2^16886381 is an apocalyptic number.

It is an amenable number.

16886381 is a deficient number, since it is larger than the sum of its proper divisors (740299).

16886381 is a wasteful number, since it uses less digits than its factorization.

16886381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295.

The product of its digits is 55296, while the sum is 41.

The square root of 16886381 is about 4109.3041990099. The cubic root of 16886381 is about 256.5540419654.

The spelling of 16886381 in words is "sixteen million, eight hundred eighty-six thousand, three hundred eighty-one".