86605720 has 16 divisors (see below), whose sum is σ = 194862960. Its totient is φ = 34642272.

The previous prime is 86605711. The next prime is 86605733. The reversal of 86605720 is 2750668.

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, 1082532 + ... + 1082611.

It is an arithmetic number, because the mean of its divisors is an integer number (12178935).

Almost surely, 2^86605720 is an apocalyptic number.

It is an amenable number.

86605720 is an abundant number, since it is smaller than the sum of its proper divisors (108257240).

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

86605720 is a wasteful number, since it uses less digits than its factorization.

86605720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165154 (or 2165150 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 86605720 is about 9306.2194257389. The cubic root of 86605720 is about 442.4343716176.

The spelling of 86605720 in words is "eighty-six million, six hundred five thousand, seven hundred twenty".