85985784 has 48 divisors (see below), whose sum is σ = 233948520. Its totient is φ = 28530240.

The previous prime is 85985771. The next prime is 85985791. The reversal of 85985784 is 48758958.

It is a self number, because there is not a number n which added to its sum of digits gives 85985784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13714 + ... + 18974.

Almost surely, 2^85985784 is an apocalyptic number.

It is an amenable number.

85985784 is an abundant number, since it is smaller than the sum of its proper divisors (147962736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85985784 is a wasteful number, since it uses less digits than its factorization.

85985784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500 (or 5493 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The square root of 85985784 is about 9272.8519884661. The cubic root of 85985784 is about 441.3761733944.

The spelling of 85985784 in words is "eighty-five million, nine hundred eighty-five thousand, seven hundred eighty-four".