8159820 has 96 divisors (see below), whose sum is σ = 24385536. Its totient is φ = 2035200.

The previous prime is 8159819. The next prime is 8159821. The reversal of 8159820 is 289518.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8159819) and next prime (8159821).

It is not an unprimeable number, because it can be changed into a prime (8159821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76207 + ... + 76313.

It is an arithmetic number, because the mean of its divisors is an integer number (254016).

Almost surely, 2^8159820 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 8159820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12192768).

8159820 is an abundant number, since it is smaller than the sum of its proper divisors (16225716).

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

8159820 is a wasteful number, since it uses less digits than its factorization.

8159820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 8159820 is about 2856.5398649415. The cubic root of 8159820 is about 201.3230615736.

It can be divided in two parts, 81598 and 20, that added together give a palindrome (81618).

The spelling of 8159820 in words is "eight million, one hundred fifty-nine thousand, eight hundred twenty".