52326640 has 40 divisors (see below), whose sum is σ = 122612688. Its totient is φ = 20766720.

The previous prime is 52326623. The next prime is 52326641. The reversal of 52326640 is 4662325.

It is a happy number.

52326640 is digitally balanced in base 2, 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 (40).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 52326599 and 52326608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52326641) 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 7 ways as a sum of consecutive naturals, for example, 7984 + ... + 12976.

Almost surely, 2^52326640 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 52326640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61306344).

52326640 is an abundant number, since it is smaller than the sum of its proper divisors (70286048).

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

52326640 is a wasteful number, since it uses less digits than its factorization.

52326640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137 (or 5131 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 52326640 is about 7233.7155044970. The cubic root of 52326640 is about 374.0310153771.

Adding to 52326640 its reverse (4662325), we get a palindrome (56988965).

The spelling of 52326640 in words is "fifty-two million, three hundred twenty-six thousand, six hundred forty".