84981618 has 12 divisors (see below), whose sum is σ = 184126878. Its totient is φ = 28327200.

The previous prime is 84981613. The next prime is 84981679. The reversal of 84981618 is 81618948.

It can be written as a sum of positive squares in only one way, i.e., 67617729 + 17363889 = 8223^2 + 4167^2 .

It is not an unprimeable number, because it can be changed into a prime (84981613) 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 5 ways as a sum of consecutive naturals, for example, 2360583 + ... + 2360618.

Almost surely, 2^84981618 is an apocalyptic number.

84981618 is an abundant number, since it is smaller than the sum of its proper divisors (99145260).

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

84981618 is a wasteful number, since it uses less digits than its factorization.

84981618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721209 (or 4721206 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 84981618 is about 9218.5474994708. The cubic root of 84981618 is about 439.6512698237.

The spelling of 84981618 in words is "eighty-four million, nine hundred eighty-one thousand, six hundred eighteen".