440807 has 2 divisors, whose sum is σ = 440808. Its totient is φ = 440806.

The previous prime is 440773. The next prime is 440809. The reversal of 440807 is 708044.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440807 - 2⁸ = 440551 is a prime.

It is a super-2 number, since 2×440807² = 388621622498, which contains 22 as substring.

Together with 440809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220403 + 220404.

It is an arithmetic number, because the mean of its divisors is an integer number (220404).

2⁴⁴⁰⁸⁰⁷ is an apocalyptic number.

440807 is a deficient number, since it is larger than the sum of its proper divisors (1).

440807 is an equidigital number, since it uses as much as digits as its factorization.

440807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 440807 is about 663.9329785453. The cubic root of 440807 is about 76.1055205528.

The spelling of 440807 in words is "four hundred forty thousand, eight hundred seven".