84440172 has 12 divisors (see below), whose sum is σ = 197027096. Its totient is φ = 28146720.

The previous prime is 84440171. The next prime is 84440203. The reversal of 84440172 is 27104448.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (84440171) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3518329 + ... + 3518352.

Almost surely, 2^84440172 is an apocalyptic number.

It is an amenable number.

84440172 is an abundant number, since it is smaller than the sum of its proper divisors (112586924).

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

84440172 is a wasteful number, since it uses less digits than its factorization.

84440172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036688 (or 7036686 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 84440172 is about 9189.1333650133. The cubic root of 84440172 is about 438.7155585338.

The spelling of 84440172 in words is "eighty-four million, four hundred forty thousand, one hundred seventy-two".