400203504324 has 120 divisors (see below), whose sum is σ = 1131611548760. Its totient is φ = 122601517056.

The previous prime is 400203504287. The next prime is 400203504329. The reversal of 400203504324 is 423405302004.

400203504324 is a `hidden beast` number, since 400 + 203 + 50 + 4 + 3 + 2 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 69442790400 + 330760713924 = 263520^2 + 575118^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (400203504329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 757092 + ... + 1172004.

Almost surely, 2^400203504324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400203504324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565805774380).

400203504324 is an abundant number, since it is smaller than the sum of its proper divisors (731408044436).

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

400203504324 is a wasteful number, since it uses less digits than its factorization.

400203504324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415171 (or 415160 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

Adding to 400203504324 its reverse (423405302004), we get a palindrome (823608806328).

The spelling of 400203504324 in words is "four hundred billion, two hundred three million, five hundred four thousand, three hundred twenty-four".