9213728 has 24 divisors (see below), whose sum is σ = 19207692. Its totient is φ = 4335616.

The previous prime is 9213697. The next prime is 9213733. The reversal of 9213728 is 8273129.

It can be written as a sum of positive squares in 2 ways, for example, as 9168784 + 44944 = 3028^2 + 212^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 9213694 and 9213703.

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, 7925 + ... + 9012.

Almost surely, 2^9213728 is an apocalyptic number.

It is an amenable number.

9213728 is an abundant number, since it is smaller than the sum of its proper divisors (9993964).

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

9213728 is a wasteful number, since it uses less digits than its factorization.

9213728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16964 (or 16956 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 9213728 is about 3035.4123278395. The cubic root of 9213728 is about 209.6420811727.

The spelling of 9213728 in words is "nine million, two hundred thirteen thousand, seven hundred twenty-eight".