28856685 has 48 divisors (see below), whose sum is σ = 54698112. Its totient is φ = 12904320.

The previous prime is 28856683. The next prime is 28856689. The reversal of 28856685 is 58665882.

It is not a de Polignac number, because 28856685 - 2¹ = 28856683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28856683) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 22984 + ... + 24206.

It is an arithmetic number, because the mean of its divisors is an integer number (1139544).

Almost surely, 2^28856685 is an apocalyptic number.

It is an amenable number.

28856685 is a deficient number, since it is larger than the sum of its proper divisors (25841427).

28856685 is a wasteful number, since it uses less digits than its factorization.

28856685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1255 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 28856685 is about 5371.8418628995. The cubic root of 28856685 is about 306.7247441726.

The spelling of 28856685 in words is "twenty-eight million, eight hundred fifty-six thousand, six hundred eighty-five".