28069564 has 12 divisors (see below), whose sum is σ = 50815800. Its totient is φ = 13550768.

The previous prime is 28069553. The next prime is 28069579. The reversal of 28069564 is 46596082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120874 + ... + 121105.

It is an arithmetic number, because the mean of its divisors is an integer number (4234650).

Almost surely, 2^28069564 is an apocalyptic number.

It is an amenable number.

28069564 is a deficient number, since it is larger than the sum of its proper divisors (22746236).

28069564 is a wasteful number, since it uses less digits than its factorization.

28069564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242012 (or 242010 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 28069564 is about 5298.0717246938. The cubic root of 28069564 is about 303.9101621657.

The spelling of 28069564 in words is "twenty-eight million, sixty-nine thousand, five hundred sixty-four".