400444112004 has 24 divisors (see below), whose sum is σ = 934379869920. Its totient is φ = 133479902784.

The previous prime is 400444111993. The next prime is 400444112009. The reversal of 400444112004 is 400211444004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (400444112009) 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, 1894752 + ... + 2095464.

It is an arithmetic number, because the mean of its divisors is an integer number (38932494580).

Almost surely, 2^400444112004 is an apocalyptic number.

It is an amenable number.

400444112004 is an abundant number, since it is smaller than the sum of its proper divisors (533935757916).

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

400444112004 is a wasteful number, since it uses less digits than its factorization.

400444112004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366979 (or 366977 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 400444112004 its reverse (400211444004), we get a palindrome (800655556008).

The spelling of 400444112004 in words is "four hundred billion, four hundred forty-four million, one hundred twelve thousand, four".