85784918 has 4 divisors (see below), whose sum is σ = 128677380. Its totient is φ = 42892458.

The previous prime is 85784903. The next prime is 85784999. The reversal of 85784918 is 81948758.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21446228 + ... + 21446231.

It is an arithmetic number, because the mean of its divisors is an integer number (32169345).

Almost surely, 2^85784918 is an apocalyptic number.

85784918 is a deficient number, since it is larger than the sum of its proper divisors (42892462).

85784918 is a wasteful number, since it uses less digits than its factorization.

85784918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42892461.

The product of its digits is 645120, while the sum is 50.

The square root of 85784918 is about 9262.0147916099. The cubic root of 85784918 is about 441.0322150183.

The spelling of 85784918 in words is "eighty-five million, seven hundred eighty-four thousand, nine hundred eighteen".