85843642 has 16 divisors (see below), whose sum is σ = 137750760. Its totient is φ = 39979008.

The previous prime is 85843633. The next prime is 85843649. The reversal of 85843642 is 24634858.

It can be written as a sum of positive squares in 4 ways, for example, as 61449921 + 24393721 = 7839^2 + 4939^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85843595 and 85843604.

It is not an unprimeable number, because it can be changed into a prime (85843649) 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 7 ways as a sum of consecutive naturals, for example, 9717 + ... + 16312.

Almost surely, 2^85843642 is an apocalyptic number.

85843642 is a deficient number, since it is larger than the sum of its proper divisors (51907118).

85843642 is a wasteful number, since it uses less digits than its factorization.

85843642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26145.

The product of its digits is 184320, while the sum is 40.

The square root of 85843642 is about 9265.1844018346. The cubic root of 85843642 is about 441.1328281521.

The spelling of 85843642 in words is "eighty-five million, eight hundred forty-three thousand, six hundred forty-two".