400111244240 has 80 divisors (see below), whose sum is σ = 945549897600. Its totient is φ = 157434886656.

The previous prime is 400111244191. The next prime is 400111244249. The reversal of 400111244240 is 42442111004.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400111244249) 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 15 ways as a sum of consecutive naturals, for example, 1047029 + ... + 1377131.

It is an arithmetic number, because the mean of its divisors is an integer number (11819373720).

Almost surely, 2^400111244240 is an apocalyptic number.

400111244240 is a gapful number since it is divisible by the number (40) 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 400111244240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472774948800).

400111244240 is an abundant number, since it is smaller than the sum of its proper divisors (545438653360).

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

400111244240 is a wasteful number, since it uses less digits than its factorization.

400111244240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330364 (or 330358 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 400111244240 its reverse (42442111004), we get a palindrome (442553355244).

The spelling of 400111244240 in words is "four hundred billion, one hundred eleven million, two hundred forty-four thousand, two hundred forty".