8130820 has 24 divisors (see below), whose sum is σ = 17244864. Its totient is φ = 3219936.

The previous prime is 8130809. The next prime is 8130821. The reversal of 8130820 is 280318.

It is a super-2 number, since 2×8130820² = 132220467744800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8130791 and 8130800.

It is not an unprimeable number, because it can be changed into a prime (8130821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87 + ... + 4033.

It is an arithmetic number, because the mean of its divisors is an integer number (718536).

Almost surely, 2^8130820 is an apocalyptic number.

It is an amenable number.

8130820 is an abundant number, since it is smaller than the sum of its proper divisors (9114044).

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

8130820 is a wasteful number, since it uses less digits than its factorization.

8130820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4059 (or 4057 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 8130820 is about 2851.4592755289. The cubic root of 8130820 is about 201.0842777526.

The spelling of 8130820 in words is "eight million, one hundred thirty thousand, eight hundred twenty".