85985740 has 24 divisors (see below), whose sum is σ = 182231280. Its totient is φ = 34077888.

The previous prime is 85985687. The next prime is 85985771. The reversal of 85985740 is 4758958.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17542 + ... + 21901.

It is an arithmetic number, because the mean of its divisors is an integer number (7592970).

Almost surely, 2^85985740 is an apocalyptic number.

It is an amenable number.

85985740 is an abundant number, since it is smaller than the sum of its proper divisors (96245540).

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

85985740 is a wasteful number, since it uses less digits than its factorization.

85985740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39561 (or 39559 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 85985740 is about 9272.8496159487. The cubic root of 85985740 is about 441.3760981085.

Adding to 85985740 its product of nonzero digits (403200), we get a triangular number (86388940 = T₁₃₁₄₄).

The spelling of 85985740 in words is "eighty-five million, nine hundred eighty-five thousand, seven hundred forty".