440034421 has 2 divisors, whose sum is σ = 440034422. Its totient is φ = 440034420.

The previous prime is 440034407. The next prime is 440034431. The reversal of 440034421 is 124430044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428945521 + 11088900 = 20711^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 440034421 - 2⁷ = 440034293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 440034392 and 440034401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440034401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220017210 + 220017211.

It is an arithmetic number, because the mean of its divisors is an integer number (220017211).

Almost surely, 2^440034421 is an apocalyptic number.

It is an amenable number.

440034421 is a deficient number, since it is larger than the sum of its proper divisors (1).

440034421 is an equidigital number, since it uses as much as digits as its factorization.

440034421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 440034421 is about 20976.9974257519. The cubic root of 440034421 is about 760.6103251846.

Adding to 440034421 its reverse (124430044), we get a palindrome (564464465).

The spelling of 440034421 in words is "four hundred forty million, thirty-four thousand, four hundred twenty-one".