8389420 has 48 divisors (see below), whose sum is σ = 19460448. Its totient is φ = 3018240.

The previous prime is 8389373. The next prime is 8389441. The reversal of 8389420 is 249838.

It is a d-powerful number, because it can be written as 8 + 3³ + 8³ + 9 + 4⁴ + 2²³ + 0 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10267 + ... + 11053.

It is an arithmetic number, because the mean of its divisors is an integer number (405426).

Almost surely, 2^8389420 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 8389420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9730224).

8389420 is an abundant number, since it is smaller than the sum of its proper divisors (11071028).

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

8389420 is a wasteful number, since it uses less digits than its factorization.

8389420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 8389420 is about 2896.4495507431. The cubic root of 8389420 is about 203.1938904791.

The spelling of 8389420 in words is "eight million, three hundred eighty-nine thousand, four hundred twenty".