400003530540 has 96 divisors (see below), whose sum is σ = 1124493451200. Its totient is φ = 106241458176.

The previous prime is 400003530523. The next prime is 400003530551. The reversal of 400003530540 is 45035300004.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 400003530540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15531514 + ... + 15557246.

It is an arithmetic number, because the mean of its divisors is an integer number (11713473450).

Almost surely, 2^400003530540 is an apocalyptic number.

It is an amenable number.

400003530540 is an abundant number, since it is smaller than the sum of its proper divisors (724489920660).

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

400003530540 is a wasteful number, since it uses less digits than its factorization.

400003530540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26771 (or 26769 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

Adding to 400003530540 its reverse (45035300004), we get a palindrome (445038830544).

The spelling of 400003530540 in words is "four hundred billion, three million, five hundred thirty thousand, five hundred forty".