28016266 has 16 divisors (see below), whose sum is σ = 42581448. Its totient is φ = 13824000.

The previous prime is 28016249. The next prime is 28016269. The reversal of 28016266 is 66261082.

It can be written as a sum of positive squares in 4 ways, for example, as 20967241 + 7049025 = 4579^2 + 2655^2 .

It is a super-2 number, since 2×28016266² = 1569822321165512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28016269) 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, 69666 + ... + 70066.

Almost surely, 2^28016266 is an apocalyptic number.

28016266 is a deficient number, since it is larger than the sum of its proper divisors (14565182).

28016266 is a wasteful number, since it uses less digits than its factorization.

28016266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28016266 is about 5293.0393915028. The cubic root of 28016266 is about 303.7176871812.

It can be divided in two parts, 28016 and 266, that added together give a palindrome (28282).

The spelling of 28016266 in words is "twenty-eight million, sixteen thousand, two hundred sixty-six".