8239420 has 48 divisors (see below), whose sum is σ = 19938240. Its totient is φ = 2801664.

The previous prime is 8239417. The next prime is 8239421. The reversal of 8239420 is 249328.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8239421) 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, 31932 + ... + 32188.

It is an arithmetic number, because the mean of its divisors is an integer number (415380).

Almost surely, 2^8239420 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 8239420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9969120).

8239420 is an abundant number, since it is smaller than the sum of its proper divisors (11698820).

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

8239420 is a wasteful number, since it uses less digits than its factorization.

8239420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 8239420 is about 2870.4389908166. The cubic root of 8239420 is about 201.9755876782.

The spelling of 8239420 in words is "eight million, two hundred thirty-nine thousand, four hundred twenty".