8020780 has 12 divisors (see below), whose sum is σ = 16843680. Its totient is φ = 3208304.

The previous prime is 8020763. The next prime is 8020781. The reversal of 8020780 is 870208.

It is not an unprimeable number, because it can be changed into a prime (8020781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200500 + ... + 200539.

It is an arithmetic number, because the mean of its divisors is an integer number (1403640).

Almost surely, 2^8020780 is an apocalyptic number.

It is an amenable number.

8020780 is an abundant number, since it is smaller than the sum of its proper divisors (8822900).

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

8020780 is a wasteful number, since it uses less digits than its factorization.

8020780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401048 (or 401046 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 8020780 is about 2832.0981621406. The cubic root of 8020780 is about 200.1730169492.

Adding to 8020780 its reverse (870208), we get a palindrome (8890988).

The spelling of 8020780 in words is "eight million, twenty thousand, seven hundred eighty".