16286881 has 8 divisors (see below), whose sum is σ = 17968104. Its totient is φ = 14666880.

The previous prime is 16286849. The next prime is 16286887. The reversal of 16286881 is 18868261.

It can be written as a sum of positive squares in 4 ways, for example, as 1846881 + 14440000 = 1359^2 + 3800^2 .

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 16286881 - 2⁵ = 16286849 is a prime.

It is a super-2 number, since 2×16286881² = 530524985416322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16286887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14746 + ... + 15811.

It is an arithmetic number, because the mean of its divisors is an integer number (2246013).

Almost surely, 2^16286881 is an apocalyptic number.

It is an amenable number.

16286881 is a deficient number, since it is larger than the sum of its proper divisors (1681223).

16286881 is a wasteful number, since it uses less digits than its factorization.

16286881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30611.

The product of its digits is 36864, while the sum is 40.

The square root of 16286881 is about 4035.7008065514. The cubic root of 16286881 is about 253.4813283842.

The spelling of 16286881 in words is "sixteen million, two hundred eighty-six thousand, eight hundred eighty-one".