440400445 has 4 divisors (see below), whose sum is σ = 528480540. Its totient is φ = 352320352.

The previous prime is 440400421. The next prime is 440400461. The reversal of 440400445 is 544004044.

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 54552996 + 385847449 = 7386^2 + 19643^2 .

It is a cyclic number.

It is not a de Polignac number, because 440400445 - 2⁵ = 440400413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44040040 + ... + 44040049.

It is an arithmetic number, because the mean of its divisors is an integer number (132120135).

Almost surely, 2^440400445 is an apocalyptic number.

It is an amenable number.

440400445 is a deficient number, since it is larger than the sum of its proper divisors (88080095).

440400445 is an equidigital number, since it uses as much as digits as its factorization.

440400445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88080094.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 440400445 is about 20985.7200257699. The cubic root of 440400445 is about 760.8211605676.

Adding to 440400445 its reverse (544004044), we get a palindrome (984404489).

The spelling of 440400445 in words is "four hundred forty million, four hundred thousand, four hundred forty-five".