85418985 has 16 divisors (see below), whose sum is σ = 136806336. Its totient is φ = 45511488.

The previous prime is 85418969. The next prime is 85418989. The reversal of 85418985 is 58981458.

85418985 is a nontrivial binomial coefficient, being equal to C(13071, 2).

It is not a de Polignac number, because 85418985 - 2⁴ = 85418969 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85418989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17427 + ... + 21783.

It is an arithmetic number, because the mean of its divisors is an integer number (8550396).

Almost surely, 2^85418985 is an apocalyptic number.

85418985 is the 13070-th triangular number.

It is an amenable number.

85418985 is a deficient number, since it is larger than the sum of its proper divisors (51387351).

85418985 is a wasteful number, since it uses less digits than its factorization.

85418985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672.

The product of its digits is 460800, while the sum is 48.

The square root of 85418985 is about 9242.2391767363. The cubic root of 85418985 is about 440.4042170408.

It can be divided in two parts, 85 and 418985, that added together give a triangular number (419070 = T₉₁₅).

The spelling of 85418985 in words is "eighty-five million, four hundred eighteen thousand, nine hundred eighty-five".