43042840 has 64 divisors (see below), whose sum is σ = 100684800. Its totient is φ = 16547328.

The previous prime is 43042817. The next prime is 43042859. The reversal of 43042840 is 4824034.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187846 + ... + 188074.

It is an arithmetic number, because the mean of its divisors is an integer number (1573200).

Almost surely, 2^43042840 is an apocalyptic number.

43042840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43042840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50342400).

43042840 is an abundant number, since it is smaller than the sum of its proper divisors (57641960).

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

43042840 is a wasteful number, since it uses less digits than its factorization.

43042840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 43042840 is about 6560.7042304923. The cubic root of 43042840 is about 350.4561128279.

Adding to 43042840 its reverse (4824034), we get a palindrome (47866874).

The spelling of 43042840 in words is "forty-three million, forty-two thousand, eight hundred forty".