526640 has 40 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 202496.

The previous prime is 526637. The next prime is 526649. The reversal of 526640 is 46625.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (526649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207 + ... + 2433.

It is an arithmetic number, because the mean of its divisors is an integer number (31806).

2⁵²⁶⁶⁴⁰ 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 526640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636120).

526640 is an abundant number, since it is smaller than the sum of its proper divisors (745600).

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

526640 is a wasteful number, since it uses less digits than its factorization.

526640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 526640 is about 725.6996623949. The cubic root of 526640 is about 80.7553457148.

The spelling of 526640 in words is "five hundred twenty-six thousand, six hundred forty".