89712018 has 96 divisors (see below), whose sum is σ = 223134912. Its totient is φ = 25804800.

The previous prime is 89712017. The next prime is 89712019. The reversal of 89712018 is 81021798.

It is an interprime number because it is at equal distance from previous prime (89712017) and next prime (89712019).

It is a Smith number, since the sum of its digits (36) 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 (89712017) 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 47 ways as a sum of consecutive naturals, for example, 348946 + ... + 349202.

It is an arithmetic number, because the mean of its divisors is an integer number (2324322).

Almost surely, 2^89712018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89712018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111567456).

89712018 is an abundant number, since it is smaller than the sum of its proper divisors (133422894).

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

89712018 is a wasteful number, since it uses less digits than its factorization.

89712018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 89712018 is about 9471.6428353269. The cubic root of 89712018 is about 447.6619772967.

The spelling of 89712018 in words is "eighty-nine million, seven hundred twelve thousand, eighteen".