400324420 has 12 divisors (see below), whose sum is σ = 840681324. Its totient is φ = 160129760.

The previous prime is 400324399. The next prime is 400324469. The reversal of 400324420 is 24423004.

It can be written as a sum of positive squares in 2 ways, for example, as 142850304 + 257474116 = 11952^2 + 16046^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10008091 + ... + 10008130.

It is an arithmetic number, because the mean of its divisors is an integer number (70056777).

Almost surely, 2^400324420 is an apocalyptic number.

It is an amenable number.

400324420 is an abundant number, since it is smaller than the sum of its proper divisors (440356904).

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

400324420 is a wasteful number, since it uses less digits than its factorization.

400324420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20016230 (or 20016228 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 400324420 is about 20008.1088561613. The cubic root of 400324420 is about 737.0054414829.

Adding to 400324420 its reverse (24423004), we get a palindrome (424747424).

The spelling of 400324420 in words is "four hundred million, three hundred twenty-four thousand, four hundred twenty".