6523740 has 60 divisors (see below), whose sum is σ = 20470296. Its totient is φ = 1739232.

The previous prime is 6523739. The next prime is 6523747. The reversal of 6523740 is 473256.

It is a happy number.

6523740 is a `hidden beast` number, since 652 + 3 + 7 + 4 + 0 = 666.

6523740 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6523747) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 394 + ... + 3633.

Almost surely, 2^6523740 is an apocalyptic number.

6523740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6523740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10235148).

6523740 is an abundant number, since it is smaller than the sum of its proper divisors (13946556).

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

6523740 is a wasteful number, since it uses less digits than its factorization.

6523740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048 (or 4037 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 6523740 is about 2554.1613104892. The cubic root of 6523740 is about 186.8524864471.

Adding to 6523740 its reverse (473256), we get a palindrome (6996996).

The spelling of 6523740 in words is "six million, five hundred twenty-three thousand, seven hundred forty".