400340322 has 48 divisors (see below), whose sum is σ = 886579200. Its totient is φ = 130527936.

The previous prime is 400340261. The next prime is 400340329. The reversal of 400340322 is 223043004.

400340322 is a `hidden beast` number, since 4 + 0 + 0 + 340 + 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 = 400340295 and 400340304.

It is not an unprimeable number, because it can be changed into a prime (400340329) 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 23 ways as a sum of consecutive naturals, for example, 165679 + ... + 168077.

It is an arithmetic number, because the mean of its divisors is an integer number (18470400).

Almost surely, 2^400340322 is an apocalyptic number.

400340322 is an abundant number, since it is smaller than the sum of its proper divisors (486238878).

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

400340322 is a wasteful number, since it uses less digits than its factorization.

400340322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607 (or 2604 counting only the distinct ones).

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

The square root of 400340322 is about 20008.5062410966. The cubic root of 400340322 is about 737.0151999894.

Adding to 400340322 its reverse (223043004), we get a palindrome (623383326).

The spelling of 400340322 in words is "four hundred million, three hundred forty thousand, three hundred twenty-two".