9839873428 has 72 divisors (see below), whose sum is σ = 22904030016. Its totient is φ = 3608183040.

The previous prime is 9839873419. The next prime is 9839873429. The reversal of 9839873428 is 8243789389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9839873429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27826 + ... + 143017.

It is an arithmetic number, because the mean of its divisors is an integer number (318111528).

Almost surely, 2^9839873428 is an apocalyptic number.

It is an amenable number.

9839873428 is an abundant number, since it is smaller than the sum of its proper divisors (13064156588).

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

9839873428 is a wasteful number, since it uses less digits than its factorization.

9839873428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170893 (or 170880 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 61.

The square root of 9839873428 is about 99196.1361545902. The cubic root of 9839873428 is about 2142.8733513703.

The spelling of 9839873428 in words is "nine billion, eight hundred thirty-nine million, eight hundred seventy-three thousand, four hundred twenty-eight".