28564718 has 24 divisors (see below), whose sum is σ = 53029008. Its totient is φ = 11299392.

The previous prime is 28564717. The next prime is 28564727. The reversal of 28564718 is 81746582.

It is a super-2 number, since 2×28564718² = 1631886228839048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28564717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3671 + ... + 8402.

It is an arithmetic number, because the mean of its divisors is an integer number (2209542).

Almost surely, 2^28564718 is an apocalyptic number.

28564718 is a deficient number, since it is larger than the sum of its proper divisors (24464290).

28564718 is a wasteful number, since it uses less digits than its factorization.

28564718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12108 (or 12095 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 28564718 is about 5344.5970849073. The cubic root of 28564718 is about 305.6867727674.

The spelling of 28564718 in words is "twenty-eight million, five hundred sixty-four thousand, seven hundred eighteen".