85722228 has 36 divisors (see below), whose sum is σ = 229434660. Its totient is φ = 26893056.

The previous prime is 85722199. The next prime is 85722239. The reversal of 85722228 is 82222758.

It can be written as a sum of positive squares in 2 ways, for example, as 65901924 + 19820304 = 8118^2 + 4452^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 85722192 and 85722201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69423 + ... + 70646.

It is an arithmetic number, because the mean of its divisors is an integer number (6373185).

Almost surely, 2^85722228 is an apocalyptic number.

It is an amenable number.

85722228 is an abundant number, since it is smaller than the sum of its proper divisors (143712432).

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

85722228 is a wasteful number, since it uses less digits than its factorization.

85722228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140096 (or 140091 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 85722228 is about 9258.6299202420. The cubic root of 85722228 is about 440.9247561631.

The spelling of 85722228 in words is "eighty-five million, seven hundred twenty-two thousand, two hundred twenty-eight".