440407 has 4 divisors (see below), whose sum is σ = 480456. Its totient is φ = 400360.

The previous prime is 440399. The next prime is 440431. The reversal of 440407 is 704044.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 440407 - 2³ = 440399 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440497) 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, 20008 + ... + 20029.

It is an arithmetic number, because the mean of its divisors is an integer number (120114).

2⁴⁴⁰⁴⁰⁷ is an apocalyptic number.

440407 is a deficient number, since it is larger than the sum of its proper divisors (40049).

440407 is a wasteful number, since it uses less digits than its factorization.

440407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40048.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 440407 is about 663.6316749523. The cubic root of 440407 is about 76.0824935282.

The spelling of 440407 in words is "four hundred forty thousand, four hundred seven", and thus it is an iban number.