404140422 has 32 divisors (see below), whose sum is σ = 978089472. Its totient is φ = 108676224.

The previous prime is 404140421. The next prime is 404140441. The reversal of 404140422 is 224041404.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404140421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282298 + ... + 283725.

It is an arithmetic number, because the mean of its divisors is an integer number (30565296).

Almost surely, 2^404140422 is an apocalyptic number.

404140422 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

404140422 is an abundant number, since it is smaller than the sum of its proper divisors (573949050).

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

404140422 is a wasteful number, since it uses less digits than its factorization.

404140422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566052.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 404140422 is about 20103.2440665680. The cubic root of 404140422 is about 739.3398190439.

Adding to 404140422 its reverse (224041404), we get a palindrome (628181826).

The spelling of 404140422 in words is "four hundred four million, one hundred forty thousand, four hundred twenty-two".