85728736 has 24 divisors (see below), whose sum is σ = 169049160. Its totient is φ = 42795648.

The previous prime is 85728707. The next prime is 85728743. The reversal of 85728736 is 63782758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22455 + ... + 25993.

It is an arithmetic number, because the mean of its divisors is an integer number (7043715).

Almost surely, 2^85728736 is an apocalyptic number.

It is an amenable number.

85728736 is a deficient number, since it is larger than the sum of its proper divisors (83320424).

85728736 is a wasteful number, since it uses less digits than its factorization.

85728736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306 (or 4298 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 85728736 is about 9258.9813694596. The cubic root of 85728736 is about 440.9359141625.

The spelling of 85728736 in words is "eighty-five million, seven hundred twenty-eight thousand, seven hundred thirty-six".