85858643 has 16 divisors (see below), whose sum is σ = 94061856. Its totient is φ = 77898240.

The previous prime is 85858639. The next prime is 85858651. The reversal of 85858643 is 34685858.

It is a cyclic number.

It is not a de Polignac number, because 85858643 - 2² = 85858639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85858673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309821 + ... + 310097.

It is an arithmetic number, because the mean of its divisors is an integer number (5878866).

Almost surely, 2^85858643 is an apocalyptic number.

85858643 is a deficient number, since it is larger than the sum of its proper divisors (8203213).

85858643 is a wasteful number, since it uses less digits than its factorization.

85858643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its digits is 921600, while the sum is 47.

The square root of 85858643 is about 9265.9939024370. The cubic root of 85858643 is about 441.1585223405.

The spelling of 85858643 in words is "eighty-five million, eight hundred fifty-eight thousand, six hundred forty-three".