440311421 has 8 divisors (see below), whose sum is σ = 485292864. Its totient is φ = 396155520.

The previous prime is 440311409. The next prime is 440311427. The reversal of 440311421 is 124113044.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440311421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440311393 and 440311402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440311427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205265 + ... + 207398.

It is an arithmetic number, because the mean of its divisors is an integer number (60661608).

Almost surely, 2^440311421 is an apocalyptic number.

It is an amenable number.

440311421 is a deficient number, since it is larger than the sum of its proper divisors (44981443).

440311421 is a wasteful number, since it uses less digits than its factorization.

440311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412771.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 440311421 is about 20983.5988572027. The cubic root of 440311421 is about 760.7698921459.

Adding to 440311421 its reverse (124113044), we get a palindrome (564424465).

The spelling of 440311421 in words is "four hundred forty million, three hundred eleven thousand, four hundred twenty-one".