28517764 has 18 divisors (see below), whose sum is σ = 54856382. Its totient is φ = 12962400.

The previous prime is 28517707. The next prime is 28517777. The reversal of 28517764 is 46771582.

It can be written as a sum of positive squares in only one way, i.e., 21548164 + 6969600 = 4642^2 + 2640^2 .

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 5 ways as a sum of consecutive naturals, for example, 28977 + ... + 29944.

Almost surely, 2^28517764 is an apocalyptic number.

It is an amenable number.

28517764 is a deficient number, since it is larger than the sum of its proper divisors (26338618).

28517764 is a wasteful number, since it uses less digits than its factorization.

28517764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58947 (or 58934 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 28517764 is about 5340.2026178788. The cubic root of 28517764 is about 305.5191873752.

The spelling of 28517764 in words is "twenty-eight million, five hundred seventeen thousand, seven hundred sixty-four".