85422440 has 32 divisors (see below), whose sum is σ = 192662280. Its totient is φ = 34086912.

The previous prime is 85422439. The next prime is 85422451. The reversal of 85422440 is 4422458.

It can be written as a sum of positive squares in 4 ways, for example, as 85340644 + 81796 = 9238^2 + 286^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15944 + ... + 20616.

Almost surely, 2^85422440 is an apocalyptic number.

It is an amenable number.

85422440 is an abundant number, since it is smaller than the sum of its proper divisors (107239840).

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

85422440 is a wasteful number, since it uses less digits than its factorization.

85422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141 (or 5137 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 85422440 is about 9242.4260884251. The cubic root of 85422440 is about 440.4101547374.

Adding to 85422440 its reverse (4422458), we get a palindrome (89844898).

The spelling of 85422440 in words is "eighty-five million, four hundred twenty-two thousand, four hundred forty".