84418540 has 12 divisors (see below), whose sum is σ = 177278976. Its totient is φ = 33767408.

The previous prime is 84418517. The next prime is 84418541. The reversal of 84418540 is 4581448.

It is a junction number, because it is equal to n+sod(n) for n = 84418496 and 84418505.

It is not an unprimeable number, because it can be changed into a prime (84418541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2110444 + ... + 2110483.

It is an arithmetic number, because the mean of its divisors is an integer number (14773248).

Almost surely, 2^84418540 is an apocalyptic number.

It is an amenable number.

84418540 is an abundant number, since it is smaller than the sum of its proper divisors (92860436).

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

84418540 is a wasteful number, since it uses less digits than its factorization.

84418540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220936 (or 4220934 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 84418540 is about 9187.9562471749. The cubic root of 84418540 is about 438.6780917481.

Adding to 84418540 its reverse (4581448), we get a palindrome (88999988).

The spelling of 84418540 in words is "eighty-four million, four hundred eighteen thousand, five hundred forty".