28909084 has 12 divisors (see below), whose sum is σ = 50854384. Its totient is φ = 14379264.

The previous prime is 28909079. The next prime is 28909103. The reversal of 28909084 is 48090982.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17952 + ... + 19495.

Almost surely, 2^28909084 is an apocalyptic number.

It is an amenable number.

28909084 is a deficient number, since it is larger than the sum of its proper divisors (21945300).

28909084 is a wasteful number, since it uses less digits than its factorization.

28909084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37644 (or 37642 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28909084 is about 5376.7168420887. The cubic root of 28909084 is about 306.9102858313.

The spelling of 28909084 in words is "twenty-eight million, nine hundred nine thousand, eighty-four".