8408920 has 64 divisors (see below), whose sum is σ = 20704320. Its totient is φ = 3055104.

The previous prime is 8408903. The next prime is 8408921. The reversal of 8408920 is 298048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8408921) 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, 53482 + ... + 53638.

It is an arithmetic number, because the mean of its divisors is an integer number (323505).

Almost surely, 2^8408920 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 8408920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10352160).

8408920 is an abundant number, since it is smaller than the sum of its proper divisors (12295400).

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

8408920 is a wasteful number, since it uses less digits than its factorization.

8408920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 8408920 is about 2899.8137871250. The cubic root of 8408920 is about 203.3512003172.

The spelling of 8408920 in words is "eight million, four hundred eight thousand, nine hundred twenty".