85622784 has 128 divisors (see below), whose sum is σ = 249557280. Its totient is φ = 25952256.

The previous prime is 85622783. The next prime is 85622809. The reversal of 85622784 is 48722658.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×85622784² = 14662522279821312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85622783) 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, 1277919 + ... + 1277985.

Almost surely, 2^85622784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85622784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124778640).

85622784 is an abundant number, since it is smaller than the sum of its proper divisors (163934496).

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

85622784 is an equidigital number, since it uses as much as digits as its factorization.

85622784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 85 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 85622784 is about 9253.2580208270. The cubic root of 85622784 is about 440.7541886267.

The spelling of 85622784 in words is "eighty-five million, six hundred twenty-two thousand, seven hundred eighty-four".