440457 has 4 divisors (see below), whose sum is σ = 587280. Its totient is φ = 293636.

The previous prime is 440443. The next prime is 440471. The reversal of 440457 is 754044.

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 an interprime number because it is at equal distance from previous prime (440443) and next prime (440471).

It is a cyclic number.

It is not a de Polignac number, because 440457 - 2⁴ = 440441 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (440497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73407 + ... + 73412.

It is an arithmetic number, because the mean of its divisors is an integer number (146820).

2⁴⁴⁰⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

440457 is a deficient number, since it is larger than the sum of its proper divisors (146823).

440457 is a wasteful number, since it uses less digits than its factorization.

440457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146822.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 440457 is about 663.6693453822. The cubic root of 440457 is about 76.0853726686.

The spelling of 440457 in words is "four hundred forty thousand, four hundred fifty-seven".