6523240 has 64 divisors (see below), whose sum is σ = 15921360. Its totient is φ = 2396160.

The previous prime is 6523201. The next prime is 6523243. The reversal of 6523240 is 423256.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2304324 + 4218916 = 1518^2 + 2054^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6523243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35950 + ... + 36130.

Almost surely, 2^6523240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6523240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7960680).

6523240 is an abundant number, since it is smaller than the sum of its proper divisors (9398120).

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

6523240 is a wasteful number, since it uses less digits than its factorization.

6523240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 6523240 is about 2554.0634291262. The cubic root of 6523240 is about 186.8477126706.

Adding to 6523240 its reverse (423256), we get a palindrome (6946496).

The spelling of 6523240 in words is "six million, five hundred twenty-three thousand, two hundred forty".