6634820 has 24 divisors (see below), whose sum is σ = 14028504. Its totient is φ = 2635776.

The previous prime is 6634799. The next prime is 6634829. The reversal of 6634820 is 284366.

It can be written as a sum of positive squares in 4 ways, for example, as 173056 + 6461764 = 416^2 + 2542^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6634829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2084 + ... + 4196.

It is an arithmetic number, because the mean of its divisors is an integer number (584521).

Almost surely, 2^6634820 is an apocalyptic number.

It is an amenable number.

6634820 is an abundant number, since it is smaller than the sum of its proper divisors (7393684).

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

6634820 is a wasteful number, since it uses less digits than its factorization.

6634820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279 (or 2277 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 6634820 is about 2575.8144343100. The cubic root of 6634820 is about 187.9070386942.

The spelling of 6634820 in words is "six million, six hundred thirty-four thousand, eight hundred twenty".