440130021 has 8 divisors (see below), whose sum is σ = 592537920. Its totient is φ = 290571072.

The previous prime is 440130011. The next prime is 440130077. The reversal of 440130021 is 120031044.

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

It is not a de Polignac number, because 440130021 - 2¹¹ = 440127973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440130011) 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, 711876 + ... + 712493.

It is an arithmetic number, because the mean of its divisors is an integer number (74067240).

Almost surely, 2^440130021 is an apocalyptic number.

It is an amenable number.

440130021 is a deficient number, since it is larger than the sum of its proper divisors (152407899).

440130021 is a wasteful number, since it uses less digits than its factorization.

440130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424475.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 440130021 is about 20979.2759884606. The cubic root of 440130021 is about 760.6654035136.

Adding to 440130021 its reverse (120031044), we get a palindrome (560161065).

The spelling of 440130021 in words is "four hundred forty million, one hundred thirty thousand, twenty-one".