9225720 has 144 divisors (see below), whose sum is σ = 34945560. Its totient is φ = 2104704.

The previous prime is 9225719. The next prime is 9225731. The reversal of 9225720 is 275229.

It is a happy number.

9225720 is a `hidden beast` number, since 92 + 2 + 572 + 0 = 666.

9225720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9225720² = 170227819036800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17379 + ... + 17901.

Almost surely, 2^9225720 is an apocalyptic number.

9225720 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9225720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17472780).

9225720 is an abundant number, since it is smaller than the sum of its proper divisors (25719840).

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

9225720 is a wasteful number, since it uses less digits than its factorization.

9225720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 9225720 is about 3037.3870349364. The cubic root of 9225720 is about 209.7329939905.

The spelling of 9225720 in words is "nine million, two hundred twenty-five thousand, seven hundred twenty".