84378544 has 40 divisors (see below), whose sum is σ = 175368240. Its totient is φ = 39207168.

The previous prime is 84378521. The next prime is 84378571. The reversal of 84378544 is 44587348.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 84378544.

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 7 ways as a sum of consecutive naturals, for example, 13494 + ... + 18730.

It is an arithmetic number, because the mean of its divisors is an integer number (4384206).

Almost surely, 2^84378544 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 84378544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87684120).

84378544 is an abundant number, since it is smaller than the sum of its proper divisors (90989696).

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

84378544 is a wasteful number, since it uses less digits than its factorization.

84378544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317 (or 5311 counting only the distinct ones).

The product of its digits is 430080, while the sum is 43.

The square root of 84378544 is about 9185.7794443368. The cubic root of 84378544 is about 438.6088015164.

The spelling of 84378544 in words is "eighty-four million, three hundred seventy-eight thousand, five hundred forty-four".