440257 has 4 divisors (see below), whose sum is σ = 446896. Its totient is φ = 433620.

The previous prime is 440239. The next prime is 440261. The reversal of 440257 is 752044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 440257 - 2¹⁵ = 407489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3219 + ... + 3352.

It is an arithmetic number, because the mean of its divisors is an integer number (111724).

2⁴⁴⁰²⁵⁷ is an apocalyptic number.

It is an amenable number.

440257 is a deficient number, since it is larger than the sum of its proper divisors (6639).

440257 is an equidigital number, since it uses as much as digits as its factorization.

440257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6638.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 440257 is about 663.5186508306. The cubic root of 440257 is about 76.0738547994.

It can be divided in two parts, 4 and 40257, that multiplied together give a triangular number (161028 = T₅₆₇).

The spelling of 440257 in words is "four hundred forty thousand, two hundred fifty-seven".