28547864 has 8 divisors (see below), whose sum is σ = 53527260. Its totient is φ = 14273928.

The previous prime is 28547839. The next prime is 28547903. The reversal of 28547864 is 46874582.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 1784234 + ... + 1784249.

Almost surely, 2^28547864 is an apocalyptic number.

It is an amenable number.

28547864 is a deficient number, since it is larger than the sum of its proper divisors (24979396).

28547864 is a wasteful number, since it uses less digits than its factorization.

28547864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568489 (or 3568485 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 28547864 is about 5343.0201197450. The cubic root of 28547864 is about 305.6266396283.

The spelling of 28547864 in words is "twenty-eight million, five hundred forty-seven thousand, eight hundred sixty-four".