404441432421 has 32 divisors (see below), whose sum is σ = 595150174080. Its totient is φ = 242714803200.

The previous prime is 404441432407. The next prime is 404441432429. The reversal of 404441432421 is 124234144404.

It is not a de Polignac number, because 404441432421 - 2¹⁹ = 404440908133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404441432429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3851350 + ... + 3954968.

It is an arithmetic number, because the mean of its divisors is an integer number (18598442940).

Almost surely, 2^404441432421 is an apocalyptic number.

404441432421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

404441432421 is a deficient number, since it is larger than the sum of its proper divisors (190708741659).

404441432421 is a wasteful number, since it uses less digits than its factorization.

404441432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106117.

The product of its (nonzero) digits is 49152, while the sum is 33.

Adding to 404441432421 its reverse (124234144404), we get a palindrome (528675576825).

The spelling of 404441432421 in words is "four hundred four billion, four hundred forty-one million, four hundred thirty-two thousand, four hundred twenty-one".