43040646 has 96 divisors (see below), whose sum is σ = 107872128. Its totient is φ = 12752640.

The previous prime is 43040609. The next prime is 43040653. The reversal of 43040646 is 64604034.

It is a happy number.

43040646 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 (27).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 443670 + ... + 443766.

It is an arithmetic number, because the mean of its divisors is an integer number (1123668).

Almost surely, 2^43040646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43040646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53936064).

43040646 is an abundant number, since it is smaller than the sum of its proper divisors (64831482).

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

43040646 is a wasteful number, since it uses less digits than its factorization.

43040646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 43040646 is about 6560.5370207019. The cubic root of 43040646 is about 350.4501581885.

The spelling of 43040646 in words is "forty-three million, forty thousand, six hundred forty-six".