6730428 has 12 divisors (see below), whose sum is σ = 15704360. Its totient is φ = 2243472.

The previous prime is 6730391. The next prime is 6730463. The reversal of 6730428 is 8240376.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×6730428² = 90597322126368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6730395 and 6730404.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 280423 + ... + 280446.

Almost surely, 2^6730428 is an apocalyptic number.

It is an amenable number.

6730428 is an abundant number, since it is smaller than the sum of its proper divisors (8973932).

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

6730428 is a wasteful number, since it uses less digits than its factorization.

6730428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560876 (or 560874 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 6730428 is about 2594.3068438410. The cubic root of 6730428 is about 188.8053201005.

The spelling of 6730428 in words is "six million, seven hundred thirty thousand, four hundred twenty-eight".