86785728 has 28 divisors (see below), whose sum is σ = 229621080. Its totient is φ = 28928512.

The previous prime is 86785681. The next prime is 86785747. The reversal of 86785728 is 82758768.

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, 225813 + ... + 226196.

Almost surely, 2^86785728 is an apocalyptic number.

It is an amenable number.

86785728 is an abundant number, since it is smaller than the sum of its proper divisors (142835352).

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

86785728 is a wasteful number, since it uses less digits than its factorization.

86785728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452024 (or 452014 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 86785728 is about 9315.8857871917. The cubic root of 86785728 is about 442.7406893841.

The spelling of 86785728 in words is "eighty-six million, seven hundred eighty-five thousand, seven hundred twenty-eight".