400340234242 has 16 divisors (see below), whose sum is σ = 647703024192. Its totient is φ = 184486824720.

The previous prime is 400340234233. The next prime is 400340234339. The reversal of 400340234242 is 242432043004.

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 400340234242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11882484 + ... + 11916127.

It is an arithmetic number, because the mean of its divisors is an integer number (40481439012).

Almost surely, 2^400340234242 is an apocalyptic number.

400340234242 is a deficient number, since it is larger than the sum of its proper divisors (247362789950).

400340234242 is a wasteful number, since it uses less digits than its factorization.

400340234242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23799273.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 400340234242 its reverse (242432043004), we get a palindrome (642772277246).

The spelling of 400340234242 in words is "four hundred billion, three hundred forty million, two hundred thirty-four thousand, two hundred forty-two".