84318720 has 80 divisors (see below), whose sum is σ = 269580960. Its totient is φ = 22482944.

The previous prime is 84318719. The next prime is 84318733. The reversal of 84318720 is 2781348.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2191 + ... + 13169.

It is an arithmetic number, because the mean of its divisors is an integer number (3369762).

Almost surely, 2^84318720 is an apocalyptic number.

84318720 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 84318720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134790480).

84318720 is an abundant number, since it is smaller than the sum of its proper divisors (185262240).

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

84318720 is a wasteful number, since it uses less digits than its factorization.

84318720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005 (or 10989 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 84318720 is about 9182.5225292400. The cubic root of 84318720 is about 438.5051198009.

The spelling of 84318720 in words is "eighty-four million, three hundred eighteen thousand, seven hundred twenty".