440129 has 4 divisors (see below), whose sum is σ = 446400. Its totient is φ = 433860.

The previous prime is 440101. The next prime is 440131. The reversal of 440129 is 921044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 440129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440159) 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, 3029 + ... + 3170.

It is an arithmetic number, because the mean of its divisors is an integer number (111600).

2⁴⁴⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

440129 is a deficient number, since it is larger than the sum of its proper divisors (6271).

440129 is an equidigital number, since it uses as much as digits as its factorization.

440129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 440129 is about 663.4221883537. The cubic root of 440129 is about 76.0664815324.

The spelling of 440129 in words is "four hundred forty thousand, one hundred twenty-nine".