404021423442 has 32 divisors (see below), whose sum is σ = 994514274432. Its totient is φ = 106555100544.

The previous prime is 404021423387. The next prime is 404021423497. The reversal of 404021423442 is 244324120404.

It is an interprime number because it is at equal distance from previous prime (404021423387) and next prime (404021423497).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369982443 + ... + 369983534.

It is an arithmetic number, because the mean of its divisors is an integer number (31078571076).

Almost surely, 2^404021423442 is an apocalyptic number.

404021423442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

404021423442 is an abundant number, since it is smaller than the sum of its proper divisors (590492850990).

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

404021423442 is a wasteful number, since it uses less digits than its factorization.

404021423442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739966002.

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 404021423442 its reverse (244324120404), we get a palindrome (648345543846).

The spelling of 404021423442 in words is "four hundred four billion, twenty-one million, four hundred twenty-three thousand, four hundred forty-two".