9877431828 has 72 divisors (see below), whose sum is σ = 25872206976. Its totient is φ = 2929456640.

The previous prime is 9877431797. The next prime is 9877431899. The reversal of 9877431828 is 8281347789.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4125 + ... + 140612.

It is an arithmetic number, because the mean of its divisors is an integer number (359336208).

Almost surely, 2^9877431828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9877431828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12936103488).

9877431828 is an abundant number, since it is smaller than the sum of its proper divisors (15994775148).

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

9877431828 is a wasteful number, since it uses less digits than its factorization.

9877431828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144813 (or 144800 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The square root of 9877431828 is about 99385.2696731261. The cubic root of 9877431828 is about 2145.5963102130.

The spelling of 9877431828 in words is "nine billion, eight hundred seventy-seven million, four hundred thirty-one thousand, eight hundred twenty-eight".