82385985 has 16 divisors (see below), whose sum is σ = 143801280. Its totient is φ = 39944640.

The previous prime is 82385983. The next prime is 82385993. The reversal of 82385985 is 58958328.

It is not a de Polignac number, because 82385985 - 2¹ = 82385983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82385983) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 249490 + ... + 249819.

It is an arithmetic number, because the mean of its divisors is an integer number (8987580).

Almost surely, 2^82385985 is an apocalyptic number.

It is an amenable number.

82385985 is a deficient number, since it is larger than the sum of its proper divisors (61415295).

82385985 is a wasteful number, since it uses less digits than its factorization.

82385985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499328.

The product of its digits is 691200, while the sum is 48.

The square root of 82385985 is about 9076.6725731404. The cubic root of 82385985 is about 435.1287503683.

The spelling of 82385985 in words is "eighty-two million, three hundred eighty-five thousand, nine hundred eighty-five".