43090840 has 64 divisors (see below), whose sum is σ = 105235200. Its totient is φ = 15785472.

The previous prime is 43090819. The next prime is 43090867. The reversal of 43090840 is 4809034.

It is a junction number, because it is equal to n+sod(n) for n = 43090799 and 43090808.

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, 89721 + ... + 90199.

It is an arithmetic number, because the mean of its divisors is an integer number (1644300).

Almost surely, 2^43090840 is an apocalyptic number.

43090840 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 43090840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52617600).

43090840 is an abundant number, since it is smaller than the sum of its proper divisors (62144360).

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

43090840 is a wasteful number, since it uses less digits than its factorization.

43090840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 43090840 is about 6564.3613550748. The cubic root of 43090840 is about 350.5863369194.

Adding to 43090840 its reverse (4809034), we get a palindrome (47899874).

The spelling of 43090840 in words is "forty-three million, ninety thousand, eight hundred forty".