85628559 has 4 divisors (see below), whose sum is σ = 114171416. Its totient is φ = 57085704.

The previous prime is 85628551. The next prime is 85628579. The reversal of 85628559 is 95582658.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85628559 - 2³ = 85628551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85628551) 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, 14271424 + ... + 14271429.

It is an arithmetic number, because the mean of its divisors is an integer number (28542854).

Almost surely, 2^85628559 is an apocalyptic number.

85628559 is a deficient number, since it is larger than the sum of its proper divisors (28542857).

85628559 is a wasteful number, since it uses less digits than its factorization.

85628559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28542856.

The product of its digits is 864000, while the sum is 48.

The square root of 85628559 is about 9253.5700678171. The cubic root of 85628559 is about 440.7640975866.

The spelling of 85628559 in words is "eighty-five million, six hundred twenty-eight thousand, five hundred fifty-nine".