6887428 has 6 divisors (see below), whose sum is σ = 12053006. Its totient is φ = 3443712.

The previous prime is 6887417. The next prime is 6887429. The reversal of 6887428 is 8247886.

It can be written as a sum of positive squares in only one way, i.e., 6874884 + 12544 = 2622^2 + 112^2 .

It is not an unprimeable number, because it can be changed into a prime (6887429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860925 + ... + 860932.

Almost surely, 2^6887428 is an apocalyptic number.

It is an amenable number.

6887428 is a deficient number, since it is larger than the sum of its proper divisors (5165578).

6887428 is a wasteful number, since it uses less digits than its factorization.

6887428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721861 (or 1721859 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 6887428 is about 2624.3909769697. The cubic root of 6887428 is about 190.2621312622.

The spelling of 6887428 in words is "six million, eight hundred eighty-seven thousand, four hundred twenty-eight".