6509428 has 6 divisors (see below), whose sum is σ = 11391506. Its totient is φ = 3254712.

The previous prime is 6509417. The next prime is 6509429. The reversal of 6509428 is 8249056.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4235364 + 2274064 = 2058^2 + 1508^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 6509393 and 6509402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6509429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813675 + ... + 813682.

Almost surely, 2^6509428 is an apocalyptic number.

It is an amenable number.

6509428 is a deficient number, since it is larger than the sum of its proper divisors (4882078).

6509428 is a wasteful number, since it uses less digits than its factorization.

6509428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627361 (or 1627359 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 6509428 is about 2551.3580697346. The cubic root of 6509428 is about 186.7157453150.

The spelling of 6509428 in words is "six million, five hundred nine thousand, four hundred twenty-eight".