9072820 has 12 divisors (see below), whose sum is σ = 19052964. Its totient is φ = 3629120.

The previous prime is 9072799. The next prime is 9072827. The reversal of 9072820 is 282709.

9072820 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3341584 + 5731236 = 1828^2 + 2394^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9072827) 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, 226801 + ... + 226840.

It is an arithmetic number, because the mean of its divisors is an integer number (1587747).

Almost surely, 2^9072820 is an apocalyptic number.

It is an amenable number.

9072820 is an abundant number, since it is smaller than the sum of its proper divisors (9980144).

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

9072820 is a wasteful number, since it uses less digits than its factorization.

9072820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453650 (or 453648 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 9072820 is about 3012.1122157051. The cubic root of 9072820 is about 208.5678823263.

The spelling of 9072820 in words is "nine million, seventy-two thousand, eight hundred twenty".