28857893 has 8 divisors (see below), whose sum is σ = 30249600. Its totient is φ = 27477648.

The previous prime is 28857889. The next prime is 28857911. The reversal of 28857893 is 39875882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28857893 - 2² = 28857889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2528 + ... + 8006.

It is an arithmetic number, because the mean of its divisors is an integer number (3781200).

Almost surely, 2^28857893 is an apocalyptic number.

28857893 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28857893 is a deficient number, since it is larger than the sum of its proper divisors (1391707).

28857893 is a wasteful number, since it uses less digits than its factorization.

28857893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731.

The product of its digits is 967680, while the sum is 50.

The square root of 28857893 is about 5371.9542998801. The cubic root of 28857893 is about 306.7290241551.

The spelling of 28857893 in words is "twenty-eight million, eight hundred fifty-seven thousand, eight hundred ninety-three".