52262640 has 120 divisors (see below), whose sum is σ = 181640160. Its totient is φ = 13450752.

The previous prime is 52262633. The next prime is 52262657. The reversal of 52262640 is 4626225.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19629 + ... + 22131.

It is an arithmetic number, because the mean of its divisors is an integer number (1513668).

Almost surely, 2^52262640 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 52262640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90820080).

52262640 is an abundant number, since it is smaller than the sum of its proper divisors (129377520).

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

52262640 is a wasteful number, since it uses less digits than its factorization.

52262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 52262640 is about 7229.2904216112. The cubic root of 52262640 is about 373.8784624198.

Adding to 52262640 its reverse (4626225), we get a palindrome (56888865).

The spelling of 52262640 in words is "fifty-two million, two hundred sixty-two thousand, six hundred forty".