84247240 has 128 divisors (see below), whose sum is σ = 250387200. Its totient is φ = 24698880.

The previous prime is 84247237. The next prime is 84247297. The reversal of 84247240 is 4274248.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51556 + ... + 53164.

It is an arithmetic number, because the mean of its divisors is an integer number (1956150).

Almost surely, 2^84247240 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 84247240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125193600).

84247240 is an abundant number, since it is smaller than the sum of its proper divisors (166139960).

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

84247240 is a wasteful number, since it uses less digits than its factorization.

84247240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 84247240 is about 9178.6295273314. The cubic root of 84247240 is about 438.3811726024.

The spelling of 84247240 in words is "eighty-four million, two hundred forty-seven thousand, two hundred forty".