928508985 has 24 divisors (see below), whose sum is σ = 1611497160. Its totient is φ = 494564352.

The previous prime is 928508963. The next prime is 928509013. The reversal of 928508985 is 589805829.

It can be written as a sum of positive squares in 4 ways, for example, as 296941824 + 631567161 = 17232^2 + 25131^2 .

It is not a de Polignac number, because 928508985 - 2¹⁰ = 928507961 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22921 + ... + 48809.

It is an arithmetic number, because the mean of its divisors is an integer number (67145715).

Almost surely, 2^928508985 is an apocalyptic number.

It is an amenable number.

928508985 is a deficient number, since it is larger than the sum of its proper divisors (682988175).

928508985 is a wasteful number, since it uses less digits than its factorization.

928508985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26697 (or 26694 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The square root of 928508985 is about 30471.4454038531. The cubic root of 928508985 is about 975.5780871589.

The spelling of 928508985 in words is "nine hundred twenty-eight million, five hundred eight thousand, nine hundred eighty-five".