43128828 has 96 divisors (see below), whose sum is σ = 117976320. Its totient is φ = 13608000.

The previous prime is 43128817. The next prime is 43128857. The reversal of 43128828 is 82882134.

It is a happy number.

43128828 is a nontrivial binomial coefficient, being equal to C(9288, 2).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43128792 and 43128801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171703 + ... + 171953.

It is an arithmetic number, because the mean of its divisors is an integer number (1228920).

Almost surely, 2^43128828 is an apocalyptic number.

43128828 is the 9287-th triangular number and also the 4644-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43128828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58988160).

43128828 is an abundant number, since it is smaller than the sum of its proper divisors (74847492).

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

43128828 is a wasteful number, since it uses less digits than its factorization.

43128828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 336 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 43128828 is about 6567.2542207531. The cubic root of 43128828 is about 350.6893298992.

It can be divided in two parts, 43128 and 828, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 43128828 in words is "forty-three million, one hundred twenty-eight thousand, eight hundred twenty-eight".