400331244012 has 144 divisors (see below), whose sum is σ = 1104750484992. Its totient is φ = 112809352320.

The previous prime is 400331244011. The next prime is 400331244013. The reversal of 400331244012 is 210442133004.

It is an interprime number because it is at equal distance from previous prime (400331244011) and next prime (400331244013).

It is a super-2 number, since 2×400331244012² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400331244011) 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 47 ways as a sum of consecutive naturals, for example, 14709337 + ... + 14736527.

It is an arithmetic number, because the mean of its divisors is an integer number (7671878368).

Almost surely, 2^400331244012 is an apocalyptic number.

400331244012 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400331244012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552375242496).

400331244012 is an abundant number, since it is smaller than the sum of its proper divisors (704419240980).

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

400331244012 is an equidigital number, since it uses as much as digits as its factorization.

400331244012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27306 (or 27276 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 400331244012 its reverse (210442133004), we get a palindrome (610773377016).

The spelling of 400331244012 in words is "four hundred billion, three hundred thirty-one million, two hundred forty-four thousand, twelve".