85630220 has 24 divisors (see below), whose sum is σ = 193656624. Its totient is φ = 31617216.

The previous prime is 85630213. The next prime is 85630229. The reversal of 85630220 is 2203658.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 85630220.

It is not an unprimeable number, because it can be changed into a prime (85630229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164414 + ... + 164933.

It is an arithmetic number, because the mean of its divisors is an integer number (8069026).

Almost surely, 2^85630220 is an apocalyptic number.

It is an amenable number.

85630220 is an abundant number, since it is smaller than the sum of its proper divisors (108026404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85630220 is a wasteful number, since it uses less digits than its factorization.

85630220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329369 (or 329367 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 85630220 is about 9253.6598165266. The cubic root of 85630220 is about 440.7669475098.

Adding to 85630220 its reverse (2203658), we get a palindrome (87833878).

The spelling of 85630220 in words is "eighty-five million, six hundred thirty thousand, two hundred twenty".