9028720 has 20 divisors (see below), whose sum is σ = 20991960. Its totient is φ = 3611456.

The previous prime is 9028699. The next prime is 9028741. The reversal of 9028720 is 278209.

It is an interprime number because it is at equal distance from previous prime (9028699) and next prime (9028741).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56350 + ... + 56509.

It is an arithmetic number, because the mean of its divisors is an integer number (1049598).

Almost surely, 2^9028720 is an apocalyptic number.

It is an amenable number.

9028720 is an abundant number, since it is smaller than the sum of its proper divisors (11963240).

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

9028720 is a wasteful number, since it uses less digits than its factorization.

9028720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112872 (or 112866 counting only the distinct ones).

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

The square root of 9028720 is about 3004.7828540512. The cubic root of 9028720 is about 208.2294066539.

The spelling of 9028720 in words is "nine million, twenty-eight thousand, seven hundred twenty".