400243240351444 has 24 divisors (see below), whose sum is σ = 801279827122880. Its totient is φ = 171362814489216.

The previous prime is 400243240351399. The next prime is 400243240351499. The reversal of 400243240351444 is 444153042342004.

It is a junction number, because it is equal to n+sod(n) for n = 400243240351397 and 400243240351406.

It is a congruent number.

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, 7083421422 + ... + 7083477925.

Almost surely, 2^{400243240351444} is an apocalyptic number.

It is an amenable number.

400243240351444 is an abundant number, since it is smaller than the sum of its proper divisors (401036586771436).

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

400243240351444 is a wasteful number, since it uses less digits than its factorization.

400243240351444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14166900367 (or 14166900365 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 40.

Adding to 400243240351444 its reverse (444153042342004), we get a palindrome (844396282693448).

The spelling of 400243240351444 in words is "four hundred trillion, two hundred forty-three billion, two hundred forty million, three hundred fifty-one thousand, four hundred forty-four".