400520540352 has 56 divisors (see below), whose sum is σ = 1060795750896. Its totient is φ = 133370134528.

The previous prime is 400520540339. The next prime is 400520540359. The reversal of 400520540352 is 253045025004.

It is not an unprimeable number, because it can be changed into a prime (400520540359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879993 + ... + 1255160.

It is an arithmetic number, because the mean of its divisors is an integer number (18942781266).

Almost surely, 2^400520540352 is an apocalyptic number.

It is an amenable number.

400520540352 is an abundant number, since it is smaller than the sum of its proper divisors (660275210544).

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

400520540352 is a wasteful number, since it uses less digits than its factorization.

400520540352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136145 (or 2136135 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

Adding to 400520540352 its reverse (253045025004), we get a palindrome (653565565356).

The spelling of 400520540352 in words is "four hundred billion, five hundred twenty million, five hundred forty thousand, three hundred fifty-two".