43404140 has 48 divisors (see below), whose sum is σ = 98948640. Its totient is φ = 15897600.

The previous prime is 43404133. The next prime is 43404161. The reversal of 43404140 is 4140434.

43404140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35540 + ... + 36740.

It is an arithmetic number, because the mean of its divisors is an integer number (2061430).

Almost surely, 2^43404140 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 43404140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49474320).

43404140 is an abundant number, since it is smaller than the sum of its proper divisors (55544500).

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

43404140 is a wasteful number, since it uses less digits than its factorization.

43404140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 43404140 is about 6588.1818432706. The cubic root of 43404140 is about 351.4339537873.

Adding to 43404140 its reverse (4140434), we get a palindrome (47544574).

The spelling of 43404140 in words is "forty-three million, four hundred four thousand, one hundred forty".