89659818 has 16 divisors (see below), whose sum is σ = 199244160. Its totient is φ = 29886588.

The previous prime is 89659811. The next prime is 89659831. The reversal of 89659818 is 81895698.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1660367 = 89659818 / (8 + 9 + 6 + 5 + 9 + 8 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (89659811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830130 + ... + 830237.

It is an arithmetic number, because the mean of its divisors is an integer number (12452760).

Almost surely, 2^89659818 is an apocalyptic number.

89659818 is an abundant number, since it is smaller than the sum of its proper divisors (109584342).

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

89659818 is a wasteful number, since it uses less digits than its factorization.

89659818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660378 (or 1660372 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 89659818 is about 9468.8868405954. The cubic root of 89659818 is about 447.5751346435.

The spelling of 89659818 in words is "eighty-nine million, six hundred fifty-nine thousand, eight hundred eighteen".