28882857 has 8 divisors (see below), whose sum is σ = 38596576. Its totient is φ = 19212192.

The previous prime is 28882853. The next prime is 28882859. The reversal of 28882857 is 75828882.

It is a happy number.

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

It is not a de Polignac number, because 28882857 - 2² = 28882853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28882853) 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, 9163 + ... + 11904.

It is an arithmetic number, because the mean of its divisors is an integer number (4824572).

Almost surely, 2^28882857 is an apocalyptic number.

It is an amenable number.

28882857 is a deficient number, since it is larger than the sum of its proper divisors (9713719).

28882857 is a wasteful number, since it uses less digits than its factorization.

28882857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21527.

The product of its digits is 573440, while the sum is 48.

The square root of 28882857 is about 5374.2773467695. The cubic root of 28882857 is about 306.8174456767.

The spelling of 28882857 in words is "twenty-eight million, eight hundred eighty-two thousand, eight hundred fifty-seven".