84480020 has 24 divisors (see below), whose sum is σ = 178605000. Its totient is φ = 33564032.

The previous prime is 84480017. The next prime is 84480029. The reversal of 84480020 is 2008448.

It can be written as a sum of positive squares in 4 ways, for example, as 3083536 + 81396484 = 1756^2 + 9022^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84480029) 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 7 ways as a sum of consecutive naturals, for example, 11195 + ... + 17154.

It is an arithmetic number, because the mean of its divisors is an integer number (7441875).

Almost surely, 2^84480020 is an apocalyptic number.

It is an amenable number.

84480020 is an abundant number, since it is smaller than the sum of its proper divisors (94124980).

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

84480020 is a wasteful number, since it uses less digits than its factorization.

84480020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28507 (or 28505 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 84480020 is about 9191.3013224461. The cubic root of 84480020 is about 438.7845588209.

Adding to 84480020 its reverse (2008448), we get a palindrome (86488468).

The spelling of 84480020 in words is "eighty-four million, four hundred eighty thousand, twenty".