85628891 has 4 divisors (see below), whose sum is σ = 85652784. Its totient is φ = 85605000.

The previous prime is 85628863. The next prime is 85628897. The reversal of 85628891 is 19882658.

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

It is a cyclic number.

It is not a de Polignac number, because 85628891 - 2⁶ = 85628827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85628897) 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, 5360 + ... + 14141.

It is an arithmetic number, because the mean of its divisors is an integer number (21413196).

Almost surely, 2^85628891 is an apocalyptic number.

85628891 is a deficient number, since it is larger than the sum of its proper divisors (23893).

85628891 is a wasteful number, since it uses less digits than its factorization.

85628891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23892.

The product of its digits is 276480, while the sum is 47.

The square root of 85628891 is about 9253.5880068220. The cubic root of 85628891 is about 440.7646672311.

The spelling of 85628891 in words is "eighty-five million, six hundred twenty-eight thousand, eight hundred ninety-one".