6538620 has 48 divisors (see below), whose sum is σ = 19974528. Its totient is φ = 1584960.

The previous prime is 6538607. The next prime is 6538621. The reversal of 6538620 is 268356.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4294 + ... + 5613.

It is an arithmetic number, because the mean of its divisors is an integer number (416136).

Almost surely, 2^6538620 is an apocalyptic number.

6538620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6538620 is an abundant number, since it is smaller than the sum of its proper divisors (13435908).

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

6538620 is a wasteful number, since it uses less digits than its factorization.

6538620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9930 (or 9928 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6538620 is about 2557.0725449232. The cubic root of 6538620 is about 186.9944425317.

The spelling of 6538620 in words is "six million, five hundred thirty-eight thousand, six hundred twenty".