400111343440 has 40 divisors (see below), whose sum is σ = 979219870560. Its totient is φ = 151621140096.

The previous prime is 400111343297. The next prime is 400111343447. The reversal of 400111343440 is 44343111004.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400111343447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131614054 + ... + 131617093.

It is an arithmetic number, because the mean of its divisors is an integer number (24480496764).

Almost surely, 2^400111343440 is an apocalyptic number.

400111343440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400111343440 is an abundant number, since it is smaller than the sum of its proper divisors (579108527120).

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

400111343440 is a wasteful number, since it uses less digits than its factorization.

400111343440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263231179 (or 263231173 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 400111343440 its reverse (44343111004), we get a palindrome (444454454444).

The spelling of 400111343440 in words is "four hundred billion, one hundred eleven million, three hundred forty-three thousand, four hundred forty".