28268057 has 4 divisors (see below), whose sum is σ = 28608720. Its totient is φ = 27927396.

The previous prime is 28268047. The next prime is 28268087. The reversal of 28268057 is 75086282.

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 28268057 - 2¹⁴ = 28251673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28268057.

It is not an unprimeable number, because it can be changed into a prime (28268047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170207 + ... + 170372.

It is an arithmetic number, because the mean of its divisors is an integer number (7152180).

Almost surely, 2^28268057 is an apocalyptic number.

It is an amenable number.

28268057 is a deficient number, since it is larger than the sum of its proper divisors (340663).

28268057 is an equidigital number, since it uses as much as digits as its factorization.

28268057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340662.

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

The square root of 28268057 is about 5316.7712946863. The cubic root of 28268057 is about 304.6248437649.

The spelling of 28268057 in words is "twenty-eight million, two hundred sixty-eight thousand, fifty-seven".