28130570 has 32 divisors (see below), whose sum is σ = 54773712. Its totient is φ = 10340352.

The previous prime is 28130549. The next prime is 28130579. The reversal of 28130570 is 7503182.

It can be written as a sum of positive squares in 8 ways, for example, as 326041 + 27804529 = 571^2 + 5273^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (28130579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45584 + ... + 46196.

Almost surely, 2^28130570 is an apocalyptic number.

28130570 is a deficient number, since it is larger than the sum of its proper divisors (26643142).

28130570 is a wasteful number, since it uses less digits than its factorization.

28130570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 28130570 is about 5303.8259775373. The cubic root of 28130570 is about 304.1301742254.

The spelling of 28130570 in words is "twenty-eight million, one hundred thirty thousand, five hundred seventy".