28314857 has 2 divisors, whose sum is σ = 28314858. Its totient is φ = 28314856.

The previous prime is 28314829. The next prime is 28314889. The reversal of 28314857 is 75841382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22857961 + 5456896 = 4781^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 28314857 - 2²⁴ = 11537641 is a prime.

It is a super-2 number, since 2×28314857² = 1603462253860898, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28314857.

It is not a weakly prime, because it can be changed into another prime (28314827) by changing a digit.

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 as a sum of consecutive naturals, namely, 14157428 + 14157429.

It is an arithmetic number, because the mean of its divisors is an integer number (14157429).

Almost surely, 2^28314857 is an apocalyptic number.

It is an amenable number.

28314857 is a deficient number, since it is larger than the sum of its proper divisors (1).

28314857 is an equidigital number, since it uses as much as digits as its factorization.

28314857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 28314857 is about 5321.1706418795. The cubic root of 28314857 is about 304.7928612361.

The spelling of 28314857 in words is "twenty-eight million, three hundred fourteen thousand, eight hundred fifty-seven".