84413520 has 60 divisors (see below), whose sum is σ = 283491156. Its totient is φ = 22510080.

The previous prime is 84413507. The next prime is 84413521. The reversal of 84413520 is 2531448.

It can be written as a sum of positive squares in 2 ways, for example, as 17239104 + 67174416 = 4152^2 + 8196^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84413521) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 57901 + ... + 59340.

Almost surely, 2^84413520 is an apocalyptic number.

84413520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84413520 is an abundant number, since it is smaller than the sum of its proper divisors (199077636).

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

84413520 is a wasteful number, since it uses less digits than its factorization.

84413520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117260 (or 117251 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 84413520 is about 9187.6830594008. The cubic root of 84413520 is about 438.6693961555.

Adding to 84413520 its reverse (2531448), we get a palindrome (86944968).

The spelling of 84413520 in words is "eighty-four million, four hundred thirteen thousand, five hundred twenty".