404023403421 has 24 divisors (see below), whose sum is σ = 637089302304. Its totient is φ = 244690990560.

The previous prime is 404023403419. The next prime is 404023403423. The reversal of 404023403421 is 124304320404.

It is a happy number.

404023403421 is a `hidden beast` number, since 4 + 0 + 4 + 0 + 234 + 0 + 3 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (404023403419) and next prime (404023403423).

It is not a de Polignac number, because 404023403421 - 2¹ = 404023403419 is a prime.

It is a super-2 number, since 2×404023403421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404023403423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1288666 + ... + 1571211.

It is an arithmetic number, because the mean of its divisors is an integer number (26545387596).

Almost surely, 2^404023403421 is an apocalyptic number.

It is an amenable number.

404023403421 is a deficient number, since it is larger than the sum of its proper divisors (233065898883).

404023403421 is a wasteful number, since it uses less digits than its factorization.

404023403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861321 (or 2861318 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 404023403421 its reverse (124304320404), we get a palindrome (528327723825).

The spelling of 404023403421 in words is "four hundred four billion, twenty-three million, four hundred three thousand, four hundred twenty-one".