400444444398 has 16 divisors (see below), whose sum is σ = 800960207616. Its totient is φ = 133469595000.

The previous prime is 400444444381. The next prime is 400444444399. The reversal of 400444444398 is 893444444004.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444444399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2898486 + ... + 3033497.

It is an arithmetic number, because the mean of its divisors is an integer number (50060012976).

Almost surely, 2^400444444398 is an apocalyptic number.

400444444398 is an abundant number, since it is smaller than the sum of its proper divisors (400515763218).

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

400444444398 is a wasteful number, since it uses less digits than its factorization.

400444444398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943239.

The product of its (nonzero) digits is 3538944, while the sum is 48.

The spelling of 400444444398 in words is "four hundred billion, four hundred forty-four million, four hundred forty-four thousand, three hundred ninety-eight".