400430040444 has 36 divisors (see below), whose sum is σ = 1156797895344. Its totient is φ = 114408582912.

The previous prime is 400430040433. The next prime is 400430040463. The reversal of 400430040444 is 444040034004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 794503797 + ... + 794504300.

Almost surely, 2^400430040444 is an apocalyptic number.

It is an amenable number.

400430040444 is an abundant number, since it is smaller than the sum of its proper divisors (756367854900).

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

400430040444 is a wasteful number, since it uses less digits than its factorization.

400430040444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589008114 (or 1589008109 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 400430040444 its reverse (444040034004), we get a palindrome (844470074448).

The spelling of 400430040444 in words is "four hundred billion, four hundred thirty million, forty thousand, four hundred forty-four".