84918540 has 48 divisors (see below), whose sum is σ = 271740672. Its totient is φ = 19409856.

The previous prime is 84918529. The next prime is 84918541. The reversal of 84918540 is 4581948.

It is a super-2 number, since 2×84918540² = 14422316871463200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (84918541) 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 15 ways as a sum of consecutive naturals, for example, 100674 + ... + 101513.

It is an arithmetic number, because the mean of its divisors is an integer number (5661264).

Almost surely, 2^84918540 is an apocalyptic number.

It is an amenable number.

84918540 is an abundant number, since it is smaller than the sum of its proper divisors (186822132).

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

84918540 is a wasteful number, since it uses less digits than its factorization.

84918540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202206 (or 202204 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 84918540 is about 9215.1256095617. The cubic root of 84918540 is about 439.5424651678.

It can be divided in two parts, 84918 and 540, that added together give a palindrome (85458).

The spelling of 84918540 in words is "eighty-four million, nine hundred eighteen thousand, five hundred forty".