405421434 has 48 divisors (see below), whose sum is σ = 961178400. Its totient is φ = 122482080.

The previous prime is 405421417. The next prime is 405421453. The reversal of 405421434 is 434124504.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 405421398 and 405421407.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66169 + ... + 72035.

It is an arithmetic number, because the mean of its divisors is an integer number (20024550).

Almost surely, 2^405421434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405421434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (480589200).

405421434 is an abundant number, since it is smaller than the sum of its proper divisors (555756966).

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

405421434 is a wasteful number, since it uses less digits than its factorization.

405421434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6235 (or 6232 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 405421434 is about 20135.0796869543. The cubic root of 405421434 is about 740.1201618846.

Adding to 405421434 its reverse (434124504), we get a palindrome (839545938).

The spelling of 405421434 in words is "four hundred five million, four hundred twenty-one thousand, four hundred thirty-four".