6538628 has 6 divisors (see below), whose sum is σ = 11442606. Its totient is φ = 3269312.

The previous prime is 6538621. The next prime is 6538669. The reversal of 6538628 is 8268356.

It can be written as a sum of positive squares in only one way, i.e., 6310144 + 228484 = 2512^2 + 478^2 .

It is a super-2 number, since 2×6538628² = 85507312244768, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6538591 and 6538600.

It is not an unprimeable number, because it can be changed into a prime (6538621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817325 + ... + 817332.

It is an arithmetic number, because the mean of its divisors is an integer number (1907101).

Almost surely, 2^6538628 is an apocalyptic number.

It is an amenable number.

6538628 is a deficient number, since it is larger than the sum of its proper divisors (4903978).

6538628 is a wasteful number, since it uses less digits than its factorization.

6538628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634661 (or 1634659 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 6538628 is about 2557.0741092115. The cubic root of 6538628 is about 186.9945187942.

The spelling of 6538628 in words is "six million, five hundred thirty-eight thousand, six hundred twenty-eight".