84870450 has 144 divisors (see below), whose sum is σ = 272259360. Its totient is φ = 19383840.

The previous prime is 84870439. The next prime is 84870469. The reversal of 84870450 is 5407848.

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 71 ways as a sum of consecutive naturals, for example, 65509 + ... + 66791.

It is an arithmetic number, because the mean of its divisors is an integer number (1890690).

Almost surely, 2^84870450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84870450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136129680).

84870450 is an abundant number, since it is smaller than the sum of its proper divisors (187388910).

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

84870450 is a wasteful number, since it uses less digits than its factorization.

84870450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 84870450 is about 9212.5159429984. The cubic root of 84870450 is about 439.4594774460.

The spelling of 84870450 in words is "eighty-four million, eight hundred seventy thousand, four hundred fifty".