8243420 has 12 divisors (see below), whose sum is σ = 17311224. Its totient is φ = 3297360.

The previous prime is 8243393. The next prime is 8243423. The reversal of 8243420 is 243428.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8243423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206066 + ... + 206105.

It is an arithmetic number, because the mean of its divisors is an integer number (1442602).

Almost surely, 2^8243420 is an apocalyptic number.

It is an amenable number.

8243420 is an abundant number, since it is smaller than the sum of its proper divisors (9067804).

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

8243420 is a wasteful number, since it uses less digits than its factorization.

8243420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412180 (or 412178 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 8243420 is about 2871.1356638097. The cubic root of 8243420 is about 202.0082668250.

Adding to 8243420 its reverse (243428), we get a palindrome (8486848).

The spelling of 8243420 in words is "eight million, two hundred forty-three thousand, four hundred twenty".