440144309 has 8 divisors (see below), whose sum is σ = 480368928. Its totient is φ = 399954960.

The previous prime is 440144273. The next prime is 440144321. The reversal of 440144309 is 903441044.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 440144309 - 2²⁰ = 439095733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440144009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21974 + ... + 36920.

It is an arithmetic number, because the mean of its divisors is an integer number (60046116).

Almost surely, 2^440144309 is an apocalyptic number.

It is an amenable number.

440144309 is a deficient number, since it is larger than the sum of its proper divisors (40224619).

440144309 is a wasteful number, since it uses less digits than its factorization.

440144309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17635.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 440144309 is about 20979.6165122244. The cubic root of 440144309 is about 760.6736346189.

The spelling of 440144309 in words is "four hundred forty million, one hundred forty-four thousand, three hundred nine".