43026640 has 40 divisors (see below), whose sum is σ = 105305760. Its totient is φ = 16304256.

The previous prime is 43026623. The next prime is 43026649. The reversal of 43026640 is 4662034.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43026649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12634 + ... + 15673.

It is an arithmetic number, because the mean of its divisors is an integer number (2632644).

Almost surely, 2^43026640 is an apocalyptic number.

43026640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43026640 is an abundant number, since it is smaller than the sum of its proper divisors (62279120).

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

43026640 is a wasteful number, since it uses less digits than its factorization.

43026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28339 (or 28333 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 43026640 is about 6559.4694907439. The cubic root of 43026640 is about 350.4121403465.

Adding to 43026640 its reverse (4662034), we get a palindrome (47688674).

The spelling of 43026640 in words is "forty-three million, twenty-six thousand, six hundred forty".