522906840 has 192 divisors, whose sum is σ = 1839801600. Its totient is φ = 133322112.

The previous prime is 522906781. The next prime is 522906841. The reversal of 522906840 is 48609225.

It is a happy number.

522906840 is a `hidden beast` number, since 522 + 90 + 6 + 8 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 522906795 and 522906804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522906841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 222391 + ... + 224729.

It is an arithmetic number, because the mean of its divisors is an integer number (9582300).

Almost surely, 2^522906840 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 522906840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919900800).

522906840 is an abundant number, since it is smaller than the sum of its proper divisors (1316894760).

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

522906840 is a wasteful number, since it uses less digits than its factorization.

522906840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2372 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 522906840 is about 22867.1563601599. The cubic root of 522906840 is about 805.6407793641.

The spelling of 522906840 in words is "five hundred twenty-two million, nine hundred six thousand, eight hundred forty".