440420834 has 8 divisors (see below), whose sum is σ = 755007168. Its totient is φ = 188751780.

The previous prime is 440420801. The next prime is 440420843. The reversal of 440420834 is 438024044.

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

It is a super-2 number, since 2×440420834² = 387941022042511112, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 440420797 and 440420806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15729302 + ... + 15729329.

It is an arithmetic number, because the mean of its divisors is an integer number (94375896).

Almost surely, 2^440420834 is an apocalyptic number.

440420834 is a deficient number, since it is larger than the sum of its proper divisors (314586334).

440420834 is a wasteful number, since it uses less digits than its factorization.

440420834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31458640.

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 440420834 is about 20986.2058028601. The cubic root of 440420834 is about 760.8329015059.

Adding to 440420834 its reverse (438024044), we get a palindrome (878444878).

The spelling of 440420834 in words is "four hundred forty million, four hundred twenty thousand, eight hundred thirty-four".