8428434 has 32 divisors (see below), whose sum is σ = 19536000. Its totient is φ = 2374272.

The previous prime is 8428423. The next prime is 8428439. The reversal of 8428434 is 4348248.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8428395 and 8428404.

It is not an unprimeable number, because it can be changed into a prime (8428439) 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, 1692 + ... + 4440.

It is an arithmetic number, because the mean of its divisors is an integer number (610500).

Almost surely, 2^8428434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8428434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9768000).

8428434 is an abundant number, since it is smaller than the sum of its proper divisors (11107566).

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

8428434 is a wasteful number, since it uses less digits than its factorization.

8428434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834.

The product of its digits is 24576, while the sum is 33.

The square root of 8428434 is about 2903.1765361411. The cubic root of 8428434 is about 203.5083798242.

The spelling of 8428434 in words is "eight million, four hundred twenty-eight thousand, four hundred thirty-four".