8120730 has 32 divisors (see below), whose sum is σ = 20637504. Its totient is φ = 2038016.

The previous prime is 8120719. The next prime is 8120731. The reversal of 8120730 is 370218.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 8120697 and 8120706.

It is not an unprimeable number, because it can be changed into a prime (8120731) 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, 7452 + ... + 8471.

It is an arithmetic number, because the mean of its divisors is an integer number (644922).

Almost surely, 2^8120730 is an apocalyptic number.

8120730 is an abundant number, since it is smaller than the sum of its proper divisors (12516774).

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

8120730 is a wasteful number, since it uses less digits than its factorization.

8120730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15950.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 8120730 is about 2849.6894567654. The cubic root of 8120730 is about 201.0010643245.

Adding to 8120730 its reverse (370218), we get a palindrome (8490948).

The spelling of 8120730 in words is "eight million, one hundred twenty thousand, seven hundred thirty".