28857323 has 8 divisors (see below), whose sum is σ = 31526976. Its totient is φ = 26195400.

The previous prime is 28857319. The next prime is 28857337. The reversal of 28857323 is 32375882.

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

It is not a de Polignac number, because 28857323 - 2² = 28857319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28857383) 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, 8228 + ... + 11198.

It is an arithmetic number, because the mean of its divisors is an integer number (3940872).

Almost surely, 2^28857323 is an apocalyptic number.

28857323 is a deficient number, since it is larger than the sum of its proper divisors (2669653).

28857323 is a wasteful number, since it uses less digits than its factorization.

28857323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865.

The product of its digits is 80640, while the sum is 38.

The square root of 28857323 is about 5371.9012463000. The cubic root of 28857323 is about 306.7270046419.

The spelling of 28857323 in words is "twenty-eight million, eight hundred fifty-seven thousand, three hundred twenty-three".