6538420 has 24 divisors (see below), whose sum is σ = 15692544. Its totient is φ = 2241696.

The previous prime is 6538409. The next prime is 6538423. The reversal of 6538420 is 248356.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6538423) 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, 23212 + ... + 23491.

It is an arithmetic number, because the mean of its divisors is an integer number (653856).

Almost surely, 2^6538420 is an apocalyptic number.

It is an amenable number.

6538420 is an abundant number, since it is smaller than the sum of its proper divisors (9154124).

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

6538420 is a wasteful number, since it uses less digits than its factorization.

6538420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46719 (or 46717 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6538420 is about 2557.0334374036. The cubic root of 6538420 is about 186.9925359485.

Subtracting from 6538420 its reverse (248356), we obtain a square (6290064 = 2508²).

The spelling of 6538420 in words is "six million, five hundred thirty-eight thousand, four hundred twenty".