440897 has 4 divisors (see below), whose sum is σ = 442500. Its totient is φ = 439296.

The previous prime is 440893. The next prime is 440903. The reversal of 440897 is 798044.

It is a happy number.

It is a Cunningham number, because it is equal to 664²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 179776 + 261121 = 424^2 + 511^2 .

It is a cyclic number.

It is not a de Polignac number, because 440897 - 2² = 440893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440893) 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, 272 + ... + 977.

It is an arithmetic number, because the mean of its divisors is an integer number (110625).

2⁴⁴⁰⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

440897 is a deficient number, since it is larger than the sum of its proper divisors (1603).

440897 is a wasteful number, since it uses less digits than its factorization.

440897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 440897 is about 664.0007530116. Note that the first 3 decimals coincide. The cubic root of 440897 is about 76.1106997134.

The spelling of 440897 in words is "four hundred forty thousand, eight hundred ninety-seven".