28569776 has 20 divisors (see below), whose sum is σ = 55459992. Its totient is φ = 14257536.

The previous prime is 28569767. The next prime is 28569799. The reversal of 28569776 is 67796582.

It is an unprimeable number.

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, 8900 + ... + 11676.

Almost surely, 2^28569776 is an apocalyptic number.

It is an amenable number.

28569776 is a deficient number, since it is larger than the sum of its proper divisors (26890216).

28569776 is a wasteful number, since it uses less digits than its factorization.

28569776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428 (or 3422 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 50.

The square root of 28569776 is about 5345.0702521108. The cubic root of 28569776 is about 305.7048145168.

The spelling of 28569776 in words is "twenty-eight million, five hundred sixty-nine thousand, seven hundred seventy-six".