404034021 has 8 divisors (see below), whose sum is σ = 598568960. Its totient is φ = 269355996.

The previous prime is 404034011. The next prime is 404034047. The reversal of 404034021 is 120430404.

It is not a de Polignac number, because 404034021 - 2⁵ = 404033989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404033985 and 404034003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404034011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7482085 + ... + 7482138.

It is an arithmetic number, because the mean of its divisors is an integer number (74821120).

Almost surely, 2^404034021 is an apocalyptic number.

It is an amenable number.

404034021 is a deficient number, since it is larger than the sum of its proper divisors (194534939).

404034021 is a wasteful number, since it uses less digits than its factorization.

404034021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14964232 (or 14964226 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 404034021 is about 20100.5975284318. The cubic root of 404034021 is about 739.2749295513.

Adding to 404034021 its reverse (120430404), we get a palindrome (524464425).

The spelling of 404034021 in words is "four hundred four million, thirty-four thousand, twenty-one".