440397 has 10 divisors (see below), whose sum is σ = 657998. Its totient is φ = 293544.

The previous prime is 440393. The next prime is 440399. The reversal of 440397 is 793044.

It can be written as a sum of positive squares in only one way, i.e., 385641 + 54756 = 621^2 + 234^2 .

It is not a de Polignac number, because 440397 - 2² = 440393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 440397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440393) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2638 + ... + 2799.

2⁴⁴⁰³⁹⁷ is an apocalyptic number.

It is an amenable number.

440397 is a deficient number, since it is larger than the sum of its proper divisors (217601).

440397 is an equidigital number, since it uses as much as digits as its factorization.

440397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5449 (or 5440 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 440397 is about 663.6241406097. The cubic root of 440397 is about 76.0819176740.

It can be divided in two parts, 4 and 40397, that added together give a square (40401 = 201²).

The spelling of 440397 in words is "four hundred forty thousand, three hundred ninety-seven".