400240421344 has 24 divisors (see below), whose sum is σ = 799734129768. Its totient is φ = 197133340800.

The previous prime is 400240421267. The next prime is 400240421351. The reversal of 400240421344 is 443124042004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93337507 + ... + 93341794.

It is an arithmetic number, because the mean of its divisors is an integer number (33322255407).

Almost surely, 2^400240421344 is an apocalyptic number.

It is an amenable number.

400240421344 is a deficient number, since it is larger than the sum of its proper divisors (399493708424).

400240421344 is a wasteful number, since it uses less digits than its factorization.

400240421344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186679378 (or 186679370 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 400240421344 its reverse (443124042004), we get a palindrome (843364463348).

The spelling of 400240421344 in words is "four hundred billion, two hundred forty million, four hundred twenty-one thousand, three hundred forty-four".