28857892 has 12 divisors (see below), whose sum is σ = 57715840. Its totient is φ = 12367656.

The previous prime is 28857889. The next prime is 28857911. The reversal of 28857892 is 29875882.

28857892 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515292 + ... + 515347.

Almost surely, 2^28857892 is an apocalyptic number.

It is an amenable number.

28857892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28857892 is a wasteful number, since it uses less digits than its factorization.

28857892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030650 (or 1030648 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The square root of 28857892 is about 5371.9542068041. The cubic root of 28857892 is about 306.7290206122.

The spelling of 28857892 in words is "twenty-eight million, eight hundred fifty-seven thousand, eight hundred ninety-two".