84406518 has 72 divisors (see below), whose sum is σ = 215488728. Its totient is φ = 23804928.

The previous prime is 84406507. The next prime is 84406519. The reversal of 84406518 is 81560448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84406519) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 72630 + ... + 73782.

It is an arithmetic number, because the mean of its divisors is an integer number (2992899).

Almost surely, 2^84406518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84406518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107744364).

84406518 is an abundant number, since it is smaller than the sum of its proper divisors (131082210).

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

84406518 is a wasteful number, since it uses less digits than its factorization.

84406518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 84406518 is about 9187.3019978664. The cubic root of 84406518 is about 438.6572667872.

The spelling of 84406518 in words is "eighty-four million, four hundred six thousand, five hundred eighteen".