28570 has 8 divisors (see below), whose sum is σ = 51444. Its totient is φ = 11424.

The previous prime is 28559. The next prime is 28571. The reversal of 28570 is 7582.

It can be written as a sum of positive squares in 2 ways, for example, as 28561 + 9 = 169^2 + 3^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28571) 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, 1419 + ... + 1438.

2²⁸⁵⁷⁰ is an apocalyptic number.

28570 is a deficient number, since it is larger than the sum of its proper divisors (22874).

28570 is a wasteful number, since it uses less digits than its factorization.

28570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 28570 is about 169.0266251216. The cubic root of 28570 is about 30.5705613469.

The spelling of 28570 in words is "twenty-eight thousand, five hundred seventy".