440646 has 12 divisors (see below), whose sum is σ = 884556. Its totient is φ = 146340.

The previous prime is 440641. The next prime is 440651. The reversal of 440646 is 646044.

It is an interprime number because it is at equal distance from previous prime (440641) and next prime (440651).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440641) by changing a digit.

440646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1491 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (73713).

2⁴⁴⁰⁶⁴⁶ is an apocalyptic number.

440646 is an abundant number, since it is smaller than the sum of its proper divisors (443910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

440646 is an equidigital number, since it uses as much as digits as its factorization.

440646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 440646 is about 663.8117202942. The cubic root of 440646 is about 76.0962538512.

Multiplying 440646 by its sum of digits (24), we get a square (10575504 = 3252²).

The spelling of 440646 in words is "four hundred forty thousand, six hundred forty-six".