84640180 has 12 divisors (see below), whose sum is σ = 177744420. Its totient is φ = 33856064.

The previous prime is 84640169. The next prime is 84640187. The reversal of 84640180 is 8104648.

It can be written as a sum of positive squares in 2 ways, for example, as 24980004 + 59660176 = 4998^2 + 7724^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84640187) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2115985 + ... + 2116024.

It is an arithmetic number, because the mean of its divisors is an integer number (14812035).

Almost surely, 2^84640180 is an apocalyptic number.

It is an amenable number.

84640180 is an abundant number, since it is smaller than the sum of its proper divisors (93104240).

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

84640180 is a wasteful number, since it uses less digits than its factorization.

84640180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4232018 (or 4232016 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 84640180 is about 9200.0097826035. The cubic root of 84640180 is about 439.0616711737.

The spelling of 84640180 in words is "eighty-four million, six hundred forty thousand, one hundred eighty".