28130572 has 12 divisors (see below), whose sum is σ = 49388976. Its totient is φ = 14019440.

The previous prime is 28130549. The next prime is 28130579. The reversal of 28130572 is 27503182.

It is a self number, because there is not a number n which added to its sum of digits gives 28130572.

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 3 ways as a sum of consecutive naturals, for example, 10063 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (4115748).

Almost surely, 2^28130572 is an apocalyptic number.

It is an amenable number.

28130572 is a deficient number, since it is larger than the sum of its proper divisors (21258404).

28130572 is a wasteful number, since it uses less digits than its factorization.

28130572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22928 (or 22926 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28130572 is about 5303.8261660805. The cubic root of 28130572 is about 304.1301814330.

The spelling of 28130572 in words is "twenty-eight million, one hundred thirty thousand, five hundred seventy-two".