28886842 has 16 divisors (see below), whose sum is σ = 47462760. Its totient is φ = 13124608.

The previous prime is 28886833. The next prime is 28886867. The reversal of 28886842 is 24868882.

It can be written as a sum of positive squares in 4 ways, for example, as 28398241 + 488601 = 5329^2 + 699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28886792 and 28886801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13663 + ... + 15634.

Almost surely, 2^28886842 is an apocalyptic number.

28886842 is a deficient number, since it is larger than the sum of its proper divisors (18575918).

28886842 is a wasteful number, since it uses less digits than its factorization.

28886842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29345.

The product of its digits is 393216, while the sum is 46.

The square root of 28886842 is about 5374.6480815026. The cubic root of 28886842 is about 306.8315556763.

It can be divided in two parts, 2888 and 6842, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 28886842 in words is "twenty-eight million, eight hundred eighty-six thousand, eight hundred forty-two".