400124231444 has 96 divisors (see below), whose sum is σ = 848007014400. Its totient is φ = 161372304000.

The previous prime is 400124231443. The next prime is 400124231471. The reversal of 400124231444 is 444132421004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400124231443) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 51940097 + ... + 51947799.

It is an arithmetic number, because the mean of its divisors is an integer number (8833406400).

Almost surely, 2^400124231444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400124231444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424003507200).

400124231444 is an abundant number, since it is smaller than the sum of its proper divisors (447882782956).

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

400124231444 is a wasteful number, since it uses less digits than its factorization.

400124231444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8373 (or 8371 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 400124231444 its reverse (444132421004), we get a palindrome (844256652448).

The spelling of 400124231444 in words is "four hundred billion, one hundred twenty-four million, two hundred thirty-one thousand, four hundred forty-four".