8178820 has 48 divisors (see below), whose sum is σ = 18768960. Its totient is φ = 2975616.

The previous prime is 8178769. The next prime is 8178829. The reversal of 8178820 is 288718.

It is not an unprimeable number, because it can be changed into a prime (8178829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21391 + ... + 21769.

It is an arithmetic number, because the mean of its divisors is an integer number (391020).

Almost surely, 2^8178820 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 8178820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9384480).

8178820 is an abundant number, since it is smaller than the sum of its proper divisors (10590140).

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

8178820 is a wasteful number, since it uses less digits than its factorization.

8178820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 8178820 is about 2859.8636331126. The cubic root of 8178820 is about 201.4791995392.

It can be divided in two parts, 8178 and 820, that added together give a palindrome (8998).

The spelling of 8178820 in words is "eight million, one hundred seventy-eight thousand, eight hundred twenty".