440645057 has 2 divisors, whose sum is σ = 440645058. Its totient is φ = 440645056.

The previous prime is 440645047. The next prime is 440645059. The reversal of 440645057 is 750546044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337236496 + 103408561 = 18364^2 + 10169^2 .

It is a cyclic number.

It is not a de Polignac number, because 440645057 - 2⁶ = 440644993 is a prime.

Together with 440645059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (440645059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220322528 + 220322529.

It is an arithmetic number, because the mean of its divisors is an integer number (220322529).

Almost surely, 2^440645057 is an apocalyptic number.

It is an amenable number.

440645057 is a deficient number, since it is larger than the sum of its proper divisors (1).

440645057 is an equidigital number, since it uses as much as digits as its factorization.

440645057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 440645057 is about 20991.5472750343. The cubic root of 440645057 is about 760.9619956812.

The spelling of 440645057 in words is "four hundred forty million, six hundred forty-five thousand, fifty-seven".