85981385 has 16 divisors (see below), whose sum is σ = 118272000. Its totient is φ = 58781376.

The previous prime is 85981331. The next prime is 85981411. The reversal of 85981385 is 58318958.

It is a cyclic number.

It is not a de Polignac number, because 85981385 - 2¹⁴ = 85965001 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8696 + ... + 15734.

It is an arithmetic number, because the mean of its divisors is an integer number (7392000).

Almost surely, 2^85981385 is an apocalyptic number.

It is an amenable number.

85981385 is a deficient number, since it is larger than the sum of its proper divisors (32290615).

85981385 is a wasteful number, since it uses less digits than its factorization.

85981385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400.

The product of its digits is 345600, while the sum is 47.

The square root of 85981385 is about 9272.6147876422. The cubic root of 85981385 is about 441.3686463870.

The spelling of 85981385 in words is "eighty-five million, nine hundred eighty-one thousand, three hundred eighty-five".