28517672 has 16 divisors (see below), whose sum is σ = 55314900. Its totient is φ = 13767040.

The previous prime is 28517663. The next prime is 28517707. The reversal of 28517672 is 27671582.

It can be written as a sum of positive squares in 2 ways, for example, as 26894596 + 1623076 = 5186^2 + 1274^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61229 + ... + 61692.

Almost surely, 2^28517672 is an apocalyptic number.

It is an amenable number.

28517672 is a deficient number, since it is larger than the sum of its proper divisors (26797228).

28517672 is a wasteful number, since it uses less digits than its factorization.

28517672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122956 (or 122952 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 28517672 is about 5340.1940039665. The cubic root of 28517672 is about 305.5188588339.

The spelling of 28517672 in words is "twenty-eight million, five hundred seventeen thousand, six hundred seventy-two".