440857 has 4 divisors (see below), whose sum is σ = 464080. Its totient is φ = 417636.

The previous prime is 440849. The next prime is 440863. The reversal of 440857 is 758044.

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 440857 - 2³ = 440849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440807) 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, 11583 + ... + 11620.

It is an arithmetic number, because the mean of its divisors is an integer number (116020).

2⁴⁴⁰⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

440857 is a deficient number, since it is larger than the sum of its proper divisors (23223).

440857 is a wasteful number, since it uses less digits than its factorization.

440857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23222.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 440857 is about 663.9706318807. The cubic root of 440857 is about 76.1083979513.

It can be divided in two parts, 4408 and 57, that added together give a triangular number (4465 = T₉₄).

The spelling of 440857 in words is "four hundred forty thousand, eight hundred fifty-seven".