400304322 has 64 divisors (see below), whose sum is σ = 977080320. Its totient is φ = 120474000.

The previous prime is 400304237. The next prime is 400304327. The reversal of 400304322 is 223403004.

400304322 is a `hidden beast` number, since 40 + 0 + 304 + 322 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 400304295 and 400304304.

It is not an unprimeable number, because it can be changed into a prime (400304327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87463 + ... + 91925.

It is an arithmetic number, because the mean of its divisors is an integer number (15266880).

Almost surely, 2^400304322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400304322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488540160).

400304322 is an abundant number, since it is smaller than the sum of its proper divisors (576775998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400304322 is a wasteful number, since it uses less digits than its factorization.

400304322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 4630 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400304322 is about 20007.6066034896. The cubic root of 400304322 is about 736.9931076669.

Adding to 400304322 its reverse (223403004), we get a palindrome (623707326).

The spelling of 400304322 in words is "four hundred million, three hundred four thousand, three hundred twenty-two".