440387 has 4 divisors (see below), whose sum is σ = 442800. Its totient is φ = 437976.

The previous prime is 440383. The next prime is 440389. The reversal of 440387 is 783044.

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 440387 - 2² = 440383 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (440383) 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, 908 + ... + 1305.

It is an arithmetic number, because the mean of its divisors is an integer number (110700).

2⁴⁴⁰³⁸⁷ is an apocalyptic number.

440387 is a deficient number, since it is larger than the sum of its proper divisors (2413).

440387 is a wasteful number, since it uses less digits than its factorization.

440387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 440387 is about 663.6166061816. The cubic root of 440387 is about 76.0813418111.

The spelling of 440387 in words is "four hundred forty thousand, three hundred eighty-seven".