89981418 has 16 divisors (see below), whose sum is σ = 181711296. Its totient is φ = 29702400.

The previous prime is 89981417. The next prime is 89981443. The reversal of 89981418 is 81418998.

It is not an unprimeable number, because it can be changed into a prime (89981417) 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 7 ways as a sum of consecutive naturals, for example, 72183 + ... + 73418.

It is an arithmetic number, because the mean of its divisors is an integer number (11356956).

Almost surely, 2^89981418 is an apocalyptic number.

89981418 is an abundant number, since it is smaller than the sum of its proper divisors (91729878).

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

89981418 is a wasteful number, since it uses less digits than its factorization.

89981418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145709.

The product of its digits is 165888, while the sum is 48.

The square root of 89981418 is about 9485.8535725574. The cubic root of 89981418 is about 448.1096305095.

The spelling of 89981418 in words is "eighty-nine million, nine hundred eighty-one thousand, four hundred eighteen".