85309786 has 8 divisors (see below), whose sum is σ = 128004084. Its totient is φ = 42641760.

The previous prime is 85309769. The next prime is 85309787. The reversal of 85309786 is 68790358.

It can be written as a sum of positive squares in 2 ways, for example, as 77774761 + 7535025 = 8819^2 + 2745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (85309787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8136 + ... + 15388.

Almost surely, 2^85309786 is an apocalyptic number.

85309786 is a deficient number, since it is larger than the sum of its proper divisors (42694298).

85309786 is a wasteful number, since it uses less digits than its factorization.

85309786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13136.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 85309786 is about 9236.3296822926. The cubic root of 85309786 is about 440.2164671785.

The spelling of 85309786 in words is "eighty-five million, three hundred nine thousand, seven hundred eighty-six".