84411720 has 80 divisors (see below), whose sum is σ = 283728060. Its totient is φ = 22508928.

The previous prime is 84411707. The next prime is 84411731. The reversal of 84411720 is 2711448.

It can be written as a sum of positive squares in 2 ways, for example, as 83283876 + 1127844 = 9126^2 + 1062^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9787 + ... + 16266.

Almost surely, 2^84411720 is an apocalyptic number.

It is an amenable number.

84411720 is an abundant number, since it is smaller than the sum of its proper divisors (199316340).

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

84411720 is a wasteful number, since it uses less digits than its factorization.

84411720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26076 (or 26063 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 84411720 is about 9187.5851016467. The cubic root of 84411720 is about 438.6662781300. Note that the first 3 decimals are identical.

The spelling of 84411720 in words is "eighty-four million, four hundred eleven thousand, seven hundred twenty".