28042866 has 24 divisors (see below), whose sum is σ = 61321260. Its totient is φ = 9261216.

The previous prime is 28042849. The next prime is 28042907. The reversal of 28042866 is 66824082.

It can be written as a sum of positive squares in 2 ways, for example, as 26163225 + 1879641 = 5115^2 + 1371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28042866.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5185 + ... + 9108.

Almost surely, 2^28042866 is an apocalyptic number.

28042866 is an abundant number, since it is smaller than the sum of its proper divisors (33278394).

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

28042866 is a wasteful number, since it uses less digits than its factorization.

28042866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14410 (or 14407 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 28042866 is about 5295.5515293499. The cubic root of 28042866 is about 303.8137782044.

The spelling of 28042866 in words is "twenty-eight million, forty-two thousand, eight hundred sixty-six".