28257059 has 4 divisors (see below), whose sum is σ = 28644216. Its totient is φ = 27869904.

The previous prime is 28257037. The next prime is 28257067. The reversal of 28257059 is 95075282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28257059 is a prime.

It is a super-2 number, since 2×28257059² = 1596922766658962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28257259) 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, 193469 + ... + 193614.

It is an arithmetic number, because the mean of its divisors is an integer number (7161054).

Almost surely, 2^28257059 is an apocalyptic number.

28257059 is a deficient number, since it is larger than the sum of its proper divisors (387157).

28257059 is an equidigital number, since it uses as much as digits as its factorization.

28257059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387156.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 28257059 is about 5315.7369197506. The cubic root of 28257059 is about 304.5853327530.

The spelling of 28257059 in words is "twenty-eight million, two hundred fifty-seven thousand, fifty-nine".