85687646 has 8 divisors (see below), whose sum is σ = 140216184. Its totient is φ = 38948920.

The previous prime is 85687643. The next prime is 85687703. The reversal of 85687646 is 64678658.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 85687594 and 85687603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85687643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1947425 + ... + 1947468.

It is an arithmetic number, because the mean of its divisors is an integer number (17527023).

Almost surely, 2^85687646 is an apocalyptic number.

85687646 is a deficient number, since it is larger than the sum of its proper divisors (54528538).

85687646 is a wasteful number, since it uses less digits than its factorization.

85687646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894906.

The product of its digits is 1935360, while the sum is 50.

The square root of 85687646 is about 9256.7621769169. The cubic root of 85687646 is about 440.8654556713.

The spelling of 85687646 in words is "eighty-five million, six hundred eighty-seven thousand, six hundred forty-six".