89491518 has 12 divisors (see below), whose sum is σ = 193898328. Its totient is φ = 29830500.

The previous prime is 89491487. The next prime is 89491529. The reversal of 89491518 is 81519498.

It is a congruent number.

It is an unprimeable number.

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, 2485858 + ... + 2485893.

It is an arithmetic number, because the mean of its divisors is an integer number (16158194).

Almost surely, 2^89491518 is an apocalyptic number.

89491518 is an abundant number, since it is smaller than the sum of its proper divisors (104406810).

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

89491518 is a wasteful number, since it uses less digits than its factorization.

89491518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4971759 (or 4971756 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 89491518 is about 9459.9956659610. The cubic root of 89491518 is about 447.2949122133.

It can be divided in two parts, 89491 and 518, that added together give a palindrome (90009).

The spelling of 89491518 in words is "eighty-nine million, four hundred ninety-one thousand, five hundred eighteen".