400403542340 has 48 divisors (see below), whose sum is σ = 852093623808. Its totient is φ = 158032003584.

The previous prime is 400403542289. The next prime is 400403542397. The reversal of 400403542340 is 43245304004.

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 15 ways as a sum of consecutive naturals, for example, 106739 + ... + 901221.

It is an arithmetic number, because the mean of its divisors is an integer number (17751950496).

Almost surely, 2^400403542340 is an apocalyptic number.

It is an amenable number.

400403542340 is an abundant number, since it is smaller than the sum of its proper divisors (451690081468).

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

400403542340 is a wasteful number, since it uses less digits than its factorization.

400403542340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794828 (or 794826 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 400403542340 its reverse (43245304004), we get a palindrome (443648846344).

The spelling of 400403542340 in words is "four hundred billion, four hundred three million, five hundred forty-two thousand, three hundred forty".