400002320425 has 12 divisors (see below), whose sum is σ = 509408361676. Its totient is φ = 311353156800.

The previous prime is 400002320413. The next prime is 400002320447. The reversal of 400002320425 is 524023200004.

It can be written as a sum of positive squares in 6 ways, for example, as 83909867584 + 316092452841 = 289672^2 + 562221^2 .

It is not a de Polignac number, because 400002320425 - 2³¹ = 397854836777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400002320396 and 400002320405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216216546 + ... + 216218395.

Almost surely, 2^400002320425 is an apocalyptic number.

It is an amenable number.

400002320425 is a deficient number, since it is larger than the sum of its proper divisors (109406041251).

400002320425 is a wasteful number, since it uses less digits than its factorization.

400002320425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432434988 (or 432434983 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 400002320425 its reverse (524023200004), we get a palindrome (924025520429).

The spelling of 400002320425 in words is "four hundred billion, two million, three hundred twenty thousand, four hundred twenty-five".