84442005 has 24 divisors (see below), whose sum is σ = 147445272. Its totient is φ = 44703744.

The previous prime is 84441977. The next prime is 84442019. The reversal of 84442005 is 50024448.

It can be written as a sum of positive squares in 4 ways, for example, as 224676 + 84217329 = 474^2 + 9177^2 .

It is not a de Polignac number, because 84442005 - 2⁹ = 84441493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84442005.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 684 + ... + 13013.

It is an arithmetic number, because the mean of its divisors is an integer number (6143553).

Almost surely, 2^84442005 is an apocalyptic number.

It is an amenable number.

84442005 is a deficient number, since it is larger than the sum of its proper divisors (63003267).

84442005 is a wasteful number, since it uses less digits than its factorization.

84442005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13845 (or 13842 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 84442005 is about 9189.2331018426. The cubic root of 84442005 is about 438.7187330094.

It can be divided in two parts, 844 and 42005, that added together give a square (42849 = 207²).

The spelling of 84442005 in words is "eighty-four million, four hundred forty-two thousand, five".