1985565028 has 6 divisors (see below), whose sum is σ = 3474738806. Its totient is φ = 992782512.

The previous prime is 1985565013. The next prime is 1985565047. The reversal of 1985565028 is 8205655891.

It can be written as a sum of positive squares in only one way, i.e., 1964971584 + 20593444 = 44328^2 + 4538^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248195625 + ... + 248195632.

Almost surely, 2^1985565028 is an apocalyptic number.

It is an amenable number.

1985565028 is a deficient number, since it is larger than the sum of its proper divisors (1489173778).

1985565028 is a wasteful number, since it uses less digits than its factorization.

1985565028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496391261 (or 496391259 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 49.

The square root of 1985565028 is about 44559.6793974104. The cubic root of 1985565028 is about 1256.8825738956.

The spelling of 1985565028 in words is "one billion, nine hundred eighty-five million, five hundred sixty-five thousand, twenty-eight".