84445140 has 48 divisors (see below), whose sum is σ = 254636928. Its totient is φ = 20786304.

The previous prime is 84445093. The next prime is 84445169. The reversal of 84445140 is 4154448.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 84445098 and 84445107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53352 + ... + 54911.

It is an arithmetic number, because the mean of its divisors is an integer number (5304936).

Almost surely, 2^84445140 is an apocalyptic number.

It is an amenable number.

84445140 is an abundant number, since it is smaller than the sum of its proper divisors (170191788).

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

84445140 is a wasteful number, since it uses less digits than its factorization.

84445140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108288 (or 108286 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

The square root of 84445140 is about 9189.4036803266. The cubic root of 84445140 is about 438.7241622434.

Adding to 84445140 its reverse (4154448), we get a palindrome (88599588).

The spelling of 84445140 in words is "eighty-four million, four hundred forty-five thousand, one hundred forty".