28857097 has 4 divisors (see below), whose sum is σ = 28872400. Its totient is φ = 28841796.

The previous prime is 28857091. The next prime is 28857113. The reversal of 28857097 is 79075882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28857097 - 2³ = 28857089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28857091) 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 in 3 ways as a sum of consecutive naturals, for example, 4347 + ... + 8752.

It is an arithmetic number, because the mean of its divisors is an integer number (7218100).

Almost surely, 2^28857097 is an apocalyptic number.

It is an amenable number.

28857097 is a deficient number, since it is larger than the sum of its proper divisors (15303).

28857097 is a wasteful number, since it uses less digits than its factorization.

28857097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15302.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 28857097 is about 5371.8802108759. The cubic root of 28857097 is about 306.7262039152.

The spelling of 28857097 in words is "twenty-eight million, eight hundred fifty-seven thousand, ninety-seven".