440420401 has 4 divisors (see below), whose sum is σ = 451162404. Its totient is φ = 429678400.

The previous prime is 440420369. The next prime is 440420443. The reversal of 440420401 is 104024044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23280625 + 417139776 = 4825^2 + 20424^2 .

It is a cyclic number.

It is not a de Polignac number, because 440420401 - 2⁵ = 440420369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440420471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5370940 + ... + 5371021.

It is an arithmetic number, because the mean of its divisors is an integer number (112790601).

Almost surely, 2^440420401 is an apocalyptic number.

440420401 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

440420401 is a deficient number, since it is larger than the sum of its proper divisors (10742003).

440420401 is a wasteful number, since it uses less digits than its factorization.

440420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10742002.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 440420401 is about 20986.1954865573. The cubic root of 440420401 is about 760.8326521680.

Adding to 440420401 its reverse (104024044), we get a palindrome (544444445).

The spelling of 440420401 in words is "four hundred forty million, four hundred twenty thousand, four hundred one".