985520408 has 16 divisors (see below), whose sum is σ = 1848986880. Its totient is φ = 492457248.

The previous prime is 985520383. The next prime is 985520461. The reversal of 985520408 is 804025589.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23735 + ... + 50342.

It is an arithmetic number, because the mean of its divisors is an integer number (115561680).

Almost surely, 2^985520408 is an apocalyptic number.

It is an amenable number.

985520408 is a deficient number, since it is larger than the sum of its proper divisors (863466472).

985520408 is a wasteful number, since it uses less digits than its factorization.

985520408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75746 (or 75742 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 985520408 is about 31392.9993469882. Note that the first 3 decimals coincide. The cubic root of 985520408 is about 995.1499847135.

Adding to 985520408 its sum of digits (41), we get a square (985520449 = 31393²).

The spelling of 985520408 in words is "nine hundred eighty-five million, five hundred twenty thousand, four hundred eight".