989427618 has 12 divisors (see below), whose sum is σ = 2143759878. Its totient is φ = 329809200.

The previous prime is 989427599. The next prime is 989427623. The reversal of 989427618 is 816724989.

It can be written as a sum of positive squares in only one way, i.e., 624350169 + 365077449 = 24987^2 + 19107^2 .

It is a super-2 number, since 2×989427618² = 1957934022522307848, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27484083 + ... + 27484118.

Almost surely, 2^989427618 is an apocalyptic number.

989427618 is an abundant number, since it is smaller than the sum of its proper divisors (1154332260).

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

989427618 is a wasteful number, since it uses less digits than its factorization.

989427618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54968209 (or 54968206 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 989427618 is about 31455.1683829542. The cubic root of 989427618 is about 996.4633797287.

The spelling of 989427618 in words is "nine hundred eighty-nine million, four hundred twenty-seven thousand, six hundred eighteen".