400004440444 has 24 divisors (see below), whose sum is σ = 800022319488. Its totient is φ = 171427594800.

The previous prime is 400004440427. The next prime is 400004440447. The reversal of 400004440444 is 444044400004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400004440447) 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, 2999367 + ... + 3129889.

It is an arithmetic number, because the mean of its divisors is an integer number (33334263312).

Almost surely, 2^400004440444 is an apocalyptic number.

It is an amenable number.

400004440444 is an abundant number, since it is smaller than the sum of its proper divisors (400017879044).

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

400004440444 is a wasteful number, since it uses less digits than its factorization.

400004440444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239985 (or 239983 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400004440444 its reverse (444044400004), we get a palindrome (844048840448).

The spelling of 400004440444 in words is "four hundred billion, four million, four hundred forty thousand, four hundred forty-four".