9280428 has 24 divisors (see below), whose sum is σ = 21750960. Its totient is φ = 3079680.

The previous prime is 9280421. The next prime is 9280429. The reversal of 9280428 is 8240829.

It is a super-2 number, since 2×9280428² = 172252687726368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9280421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288 + ... + 4496.

It is an arithmetic number, because the mean of its divisors is an integer number (906290).

Almost surely, 2^9280428 is an apocalyptic number.

It is an amenable number.

9280428 is an abundant number, since it is smaller than the sum of its proper divisors (12470532).

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

9280428 is a wasteful number, since it uses less digits than its factorization.

9280428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457 (or 3455 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 9280428 is about 3046.3794904772. The cubic root of 9280428 is about 210.1467455047.

The spelling of 9280428 in words is "nine million, two hundred eighty thousand, four hundred twenty-eight".