989422138898 has 6 divisors (see below), whose sum is σ = 1484135318421. Its totient is φ = 494710366092.

The previous prime is 989422138891. The next prime is 989422138933. The reversal of 989422138898 is 898831224989.

It can be written as a sum of positive squares in 2 ways, for example, as 634710175969 + 354711962929 = 796687^2 + 595577^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=703357.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989422138891) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1055036 + ... + 1758392.

Almost surely, 2^989422138898 is an apocalyptic number.

989422138898 is a deficient number, since it is larger than the sum of its proper divisors (494713179523).

989422138898 is an frugal number, since it uses more digits than its factorization.

989422138898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406716 (or 703359 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 71.

The spelling of 989422138898 in words is "nine hundred eighty-nine billion, four hundred twenty-two million, one hundred thirty-eight thousand, eight hundred ninety-eight".