989812142 has 16 divisors (see below), whose sum is σ = 1622409264. Its totient is φ = 449160000.

The previous prime is 989812129. The next prime is 989812147. The reversal of 989812142 is 241218989.

It is a junction number, because it is equal to n+sod(n) for n = 989812093 and 989812102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989812147) 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, 24209 + ... + 50652.

It is an arithmetic number, because the mean of its divisors is an integer number (101400579).

Almost surely, 2^989812142 is an apocalyptic number.

989812142 is a deficient number, since it is larger than the sum of its proper divisors (632597122).

989812142 is a wasteful number, since it uses less digits than its factorization.

989812142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75475.

The product of its digits is 82944, while the sum is 44.

The square root of 989812142 is about 31461.2800438889. The cubic root of 989812142 is about 996.5924491191.

The spelling of 989812142 in words is "nine hundred eighty-nine million, eight hundred twelve thousand, one hundred forty-two".