28075570 has 16 divisors (see below), whose sum is σ = 51769368. Its totient is φ = 10956160.

The previous prime is 28075561. The next prime is 28075577. The reversal of 28075570 is 7557082.

It can be written as a sum of positive squares in 4 ways, for example, as 18071001 + 10004569 = 4251^2 + 3163^2 .

It is not an unprimeable number, because it can be changed into a prime (28075577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33829 + ... + 34648.

Almost surely, 2^28075570 is an apocalyptic number.

28075570 is a deficient number, since it is larger than the sum of its proper divisors (23693798).

28075570 is a wasteful number, since it uses less digits than its factorization.

28075570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68525.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 28075570 is about 5298.6385043707. The cubic root of 28075570 is about 303.9318363447.

The spelling of 28075570 in words is "twenty-eight million, seventy-five thousand, five hundred seventy".