522965640 has 64 divisors (see below), whose sum is σ = 1577180160. Its totient is φ = 138721280.

The previous prime is 522965621. The next prime is 522965647. The reversal of 522965640 is 46569225.

It is not an unprimeable number, because it can be changed into a prime (522965647) 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, 11512 + ... + 34328.

It is an arithmetic number, because the mean of its divisors is an integer number (24643440).

Almost surely, 2^522965640 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 522965640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788590080).

522965640 is an abundant number, since it is smaller than the sum of its proper divisors (1054214520).

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

522965640 is a wasteful number, since it uses less digits than its factorization.

522965640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23022 (or 23018 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 522965640 is about 22868.4420107711. The cubic root of 522965640 is about 805.6709758852.

It can be divided in two parts, 52 and 2965640, that added together give a palindrome (2965692).

The spelling of 522965640 in words is "five hundred twenty-two million, nine hundred sixty-five thousand, six hundred forty".