8420430 has 16 divisors (see below), whose sum is σ = 20209104. Its totient is φ = 2245440.

The previous prime is 8420413. The next prime is 8420441. The reversal of 8420430 is 340248.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8420397 and 8420406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140311 + ... + 140370.

It is an arithmetic number, because the mean of its divisors is an integer number (1263069).

Almost surely, 2^8420430 is an apocalyptic number.

8420430 is an abundant number, since it is smaller than the sum of its proper divisors (11788674).

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

8420430 is a wasteful number, since it uses less digits than its factorization.

8420430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280691.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 8420430 is about 2901.7977186565. The cubic root of 8420430 is about 203.4439393456.

Adding to 8420430 its reverse (340248), we get a palindrome (8760678).

The spelling of 8420430 in words is "eight million, four hundred twenty thousand, four hundred thirty".