404445425 has 6 divisors (see below), whose sum is σ = 501512358. Its totient is φ = 323556320.

The previous prime is 404445421. The next prime is 404445427. The reversal of 404445425 is 524544404.

It can be written as a sum of positive squares in 3 ways, for example, as 24039409 + 380406016 = 4903^2 + 19504^2 .

It is not a de Polignac number, because 404445425 - 2² = 404445421 is a prime.

It is a super-2 number, since 2×404445425² = 327152203606861250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404445391 and 404445400.

It is not an unprimeable number, because it can be changed into a prime (404445421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8088884 + ... + 8088933.

It is an arithmetic number, because the mean of its divisors is an integer number (83585393).

Almost surely, 2^404445425 is an apocalyptic number.

It is an amenable number.

404445425 is a deficient number, since it is larger than the sum of its proper divisors (97066933).

404445425 is a wasteful number, since it uses less digits than its factorization.

404445425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16177827 (or 16177822 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 32.

The square root of 404445425 is about 20110.8285508081. The cubic root of 404445425 is about 739.5257644449.

Adding to 404445425 its reverse (524544404), we get a palindrome (928989829).

The spelling of 404445425 in words is "four hundred four million, four hundred forty-five thousand, four hundred twenty-five".