400313041220 has 12 divisors (see below), whose sum is σ = 840657386604. Its totient is φ = 160125216480.

The previous prime is 400313041199. The next prime is 400313041223. The reversal of 400313041220 is 22140313004.

It can be written as a sum of positive squares in 2 ways, for example, as 313367083264 + 86945957956 = 559792^2 + 294866^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 20015652061 = 400313041220 / (4 + 0 + 0 + 3 + 1 + 3 + 0 + 4 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 400313041192 and 400313041201.

It is not an unprimeable number, because it can be changed into a prime (400313041223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10007826011 + ... + 10007826050.

It is an arithmetic number, because the mean of its divisors is an integer number (70054782217).

Almost surely, 2^400313041220 is an apocalyptic number.

It is an amenable number.

400313041220 is an abundant number, since it is smaller than the sum of its proper divisors (440344345384).

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

400313041220 is a wasteful number, since it uses less digits than its factorization.

400313041220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20015652070 (or 20015652068 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 400313041220 its reverse (22140313004), we get a palindrome (422453354224).

The spelling of 400313041220 in words is "four hundred billion, three hundred thirteen million, forty-one thousand, two hundred twenty".