85040220 has 24 divisors (see below), whose sum is σ = 238112784. Its totient is φ = 22677376.

The previous prime is 85040213. The next prime is 85040227. The reversal of 85040220 is 2204058.

It is an interprime number because it is at equal distance from previous prime (85040213) and next prime (85040227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85040227) 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, 708609 + ... + 708728.

It is an arithmetic number, because the mean of its divisors is an integer number (9921366).

Almost surely, 2^85040220 is an apocalyptic number.

It is an amenable number.

85040220 is an abundant number, since it is smaller than the sum of its proper divisors (153072564).

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

85040220 is a wasteful number, since it uses less digits than its factorization.

85040220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417349 (or 1417347 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 85040220 is about 9221.7254350799. The cubic root of 85040220 is about 439.7523054921.

Adding to 85040220 its reverse (2204058), we get a palindrome (87244278).

The spelling of 85040220 in words is "eighty-five million, forty thousand, two hundred twenty".