8435420 has 48 divisors (see below), whose sum is σ = 20502720. Its totient is φ = 2855424.

The previous prime is 8435389. The next prime is 8435431. The reversal of 8435420 is 245348.

It is a self number, because there is not a number n which added to its sum of digits gives 8435420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12122 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (427140).

Almost surely, 2^8435420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8435420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10251360).

8435420 is an abundant number, since it is smaller than the sum of its proper divisors (12067300).

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

8435420 is a wasteful number, since it uses less digits than its factorization.

8435420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 8435420 is about 2904.3794517934. The cubic root of 8435420 is about 203.5645910145.

The spelling of 8435420 in words is "eight million, four hundred thirty-five thousand, four hundred twenty".