89970618 has 32 divisors (see below), whose sum is σ = 193830912. Its totient is φ = 27759600.

The previous prime is 89970583. The next prime is 89970637. The reversal of 89970618 is 81607998.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6238 + ... + 14793.

It is an arithmetic number, because the mean of its divisors is an integer number (6057216).

Almost surely, 2^89970618 is an apocalyptic number.

89970618 is an abundant number, since it is smaller than the sum of its proper divisors (103860294).

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

89970618 is a wasteful number, since it uses less digits than its factorization.

89970618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21090.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 89970618 is about 9485.2842867254. The cubic root of 89970618 is about 448.0917017054.

It can be divided in two parts, 899 and 70618, that added together give a palindrome (71517).

The spelling of 89970618 in words is "eighty-nine million, nine hundred seventy thousand, six hundred eighteen".