989857140 has 24 divisors (see below), whose sum is σ = 2771600160. Its totient is φ = 263961888.

The previous prime is 989857139. The next prime is 989857157. The reversal of 989857140 is 41758989.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8248750 + ... + 8248869.

It is an arithmetic number, because the mean of its divisors is an integer number (115483340).

Almost surely, 2^989857140 is an apocalyptic number.

It is an amenable number.

989857140 is an abundant number, since it is smaller than the sum of its proper divisors (1781743020).

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

989857140 is a wasteful number, since it uses less digits than its factorization.

989857140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16497631 (or 16497629 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 989857140 is about 31461.9951687747. The cubic root of 989857140 is about 996.6075509705.

The spelling of 989857140 in words is "nine hundred eighty-nine million, eight hundred fifty-seven thousand, one hundred forty".