43440457 has 12 divisors (see below), whose sum is σ = 46727856. Its totient is φ = 40370240.

The previous prime is 43440451. The next prime is 43440493. The reversal of 43440457 is 75404434.

43440457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-43440457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43440451) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 23082 + ... + 24892.

It is an arithmetic number, because the mean of its divisors is an integer number (3893988).

Almost surely, 2^43440457 is an apocalyptic number.

It is an amenable number.

43440457 is a deficient number, since it is larger than the sum of its proper divisors (3287399).

43440457 is a wasteful number, since it uses less digits than its factorization.

43440457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 43440457 is about 6590.9374902209. The cubic root of 43440457 is about 351.5319434328.

The spelling of 43440457 in words is "forty-three million, four hundred forty thousand, four hundred fifty-seven".