6390628 has 6 divisors (see below), whose sum is σ = 11183606. Its totient is φ = 3195312.

The previous prime is 6390611. The next prime is 6390641. The reversal of 6390628 is 8260936.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4194304 + 2196324 = 2048^2 + 1482^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6390593 and 6390602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798825 + ... + 798832.

Almost surely, 2^6390628 is an apocalyptic number.

It is an amenable number.

6390628 is a deficient number, since it is larger than the sum of its proper divisors (4792978).

6390628 is a wasteful number, since it uses less digits than its factorization.

6390628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597661 (or 1597659 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 6390628 is about 2527.9691453813. The cubic root of 6390628 is about 185.5728820492.

The spelling of 6390628 in words is "six million, three hundred ninety thousand, six hundred twenty-eight".