28009842 has 16 divisors (see below), whose sum is σ = 64022592. Its totient is φ = 8002800.

The previous prime is 28009831. The next prime is 28009889. The reversal of 28009842 is 24890082.

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, 333409 + ... + 333492.

It is an arithmetic number, because the mean of its divisors is an integer number (4001412).

Almost surely, 2^28009842 is an apocalyptic number.

28009842 is an abundant number, since it is smaller than the sum of its proper divisors (36012750).

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

28009842 is a wasteful number, since it uses less digits than its factorization.

28009842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666913.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28009842 is about 5292.4325220072. The cubic root of 28009842 is about 303.6944717205.

The spelling of 28009842 in words is "twenty-eight million, nine thousand, eight hundred forty-two".