400243344024 has 64 divisors (see below), whose sum is σ = 1019614832640. Its totient is φ = 130880880000.

The previous prime is 400243343999. The next prime is 400243344037. The reversal of 400243344024 is 420443342004.

It is a junction number, because it is equal to n+sod(n) for n = 400243343982 and 400243344000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14297289 + ... + 14325255.

It is an arithmetic number, because the mean of its divisors is an integer number (15931481760).

Almost surely, 2^400243344024 is an apocalyptic number.

It is an amenable number.

400243344024 is an abundant number, since it is smaller than the sum of its proper divisors (619371488616).

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

400243344024 is a wasteful number, since it uses less digits than its factorization.

400243344024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39280 (or 39276 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 30.

Adding to 400243344024 its reverse (420443342004), we get a palindrome (820686686028).

The spelling of 400243344024 in words is "four hundred billion, two hundred forty-three million, three hundred forty-four thousand, twenty-four".