28909292 has 12 divisors (see below), whose sum is σ = 51449160. Its totient is φ = 14209536.

The previous prime is 28909273. The next prime is 28909297. The reversal of 28909292 is 29290982.

It is a happy number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28909297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61013 + ... + 61484.

It is an arithmetic number, because the mean of its divisors is an integer number (4287430).

Almost surely, 2^28909292 is an apocalyptic number.

It is an amenable number.

28909292 is a deficient number, since it is larger than the sum of its proper divisors (22539868).

28909292 is a wasteful number, since it uses less digits than its factorization.

28909292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122560 (or 122558 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 28909292 is about 5376.7361847128. The cubic root of 28909292 is about 306.9110218996.

The spelling of 28909292 in words is "twenty-eight million, nine hundred nine thousand, two hundred ninety-two".