400331323 has 12 divisors (see below), whose sum is σ = 466021512. Its totient is φ = 342898080.

The previous prime is 400331279. The next prime is 400331357. The reversal of 400331323 is 323133004.

It is a de Polignac number, because none of the positive numbers 2^k-400331323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400331323.

It is not an unprimeable number, because it can be changed into a prime (400301323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117936 + ... + 121282.

It is an arithmetic number, because the mean of its divisors is an integer number (38835126).

Almost surely, 2^400331323 is an apocalyptic number.

400331323 is a deficient number, since it is larger than the sum of its proper divisors (65690189).

400331323 is a wasteful number, since it uses less digits than its factorization.

400331323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5802 (or 5795 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 400331323 is about 20008.2813604767. The cubic root of 400331323 is about 737.0096776466.

Adding to 400331323 its reverse (323133004), we get a palindrome (723464327).

The spelling of 400331323 in words is "four hundred million, three hundred thirty-one thousand, three hundred twenty-three".