440020859 has 6 divisors (see below), whose sum is σ = 446136516. Its totient is φ = 433987920.

The previous prime is 440020817. The next prime is 440020873. The reversal of 440020859 is 958020044.

It is a de Polignac number, because none of the positive numbers 2^k-440020859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440020459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35957 + ... + 46614.

It is an arithmetic number, because the mean of its divisors is an integer number (74356086).

Almost surely, 2^440020859 is an apocalyptic number.

440020859 is a deficient number, since it is larger than the sum of its proper divisors (6115657).

440020859 is an frugal number, since it uses more digits than its factorization.

440020859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82717 (or 82644 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 440020859 is about 20976.6741644141. The cubic root of 440020859 is about 760.6025110207.

The spelling of 440020859 in words is "four hundred forty million, twenty thousand, eight hundred fifty-nine".