84523680 has 144 divisors (see below), whose sum is σ = 292481280. Its totient is φ = 22224384.

The previous prime is 84523669. The next prime is 84523693. The reversal of 84523680 is 8632548.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 113389 + ... + 114131.

It is an arithmetic number, because the mean of its divisors is an integer number (2031120).

Almost surely, 2^84523680 is an apocalyptic number.

84523680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84523680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146240640).

84523680 is an abundant number, since it is smaller than the sum of its proper divisors (207957600).

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

84523680 is a wasteful number, since it uses less digits than its factorization.

84523680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 84523680 is about 9193.6760873983. The cubic root of 84523680 is about 438.8601350126.

The spelling of 84523680 in words is "eighty-four million, five hundred twenty-three thousand, six hundred eighty".