440013 has 16 divisors (see below), whose sum is σ = 700416. Its totient is φ = 240240.

The previous prime is 440009. The next prime is 440023. The reversal of 440013 is 310044.

It is not a de Polignac number, because 440013 - 2² = 440009 is a prime.

It is a super-2 number, since 2×440013² = 387222880338, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (43776).

2⁴⁴⁰⁰¹³ is an apocalyptic number.

It is an amenable number.

440013 is a deficient number, since it is larger than the sum of its proper divisors (260403).

440013 is a wasteful number, since it uses less digits than its factorization.

440013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 440013 is about 663.3347571174. The cubic root of 440013 is about 76.0597982742.

Adding to 440013 its reverse (310044), we get a palindrome (750057).

The spelling of 440013 in words is "four hundred forty thousand, thirteen".