85687642 has 8 divisors (see below), whose sum is σ = 128913876. Its totient is φ = 42716352.

The previous prime is 85687639. The next prime is 85687643. The reversal of 85687642 is 24678658.

It can be written as a sum of positive squares in 2 ways, for example, as 85544001 + 143641 = 9249^2 + 379^2 .

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 = 85687592 and 85687601.

It is not an unprimeable number, because it can be changed into a prime (85687643) 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, 62893 + ... + 64240.

Almost surely, 2^85687642 is an apocalyptic number.

85687642 is a deficient number, since it is larger than the sum of its proper divisors (43226234).

85687642 is a wasteful number, since it uses less digits than its factorization.

85687642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127472.

The product of its digits is 645120, while the sum is 46.

The square root of 85687642 is about 9256.7619608587. The cubic root of 85687642 is about 440.8654488113.

The spelling of 85687642 in words is "eighty-five million, six hundred eighty-seven thousand, six hundred forty-two".