522645396 has 96 divisors (see below), whose sum is σ = 1506785280. Its totient is φ = 137303424.

The previous prime is 522645391. The next prime is 522645427. The reversal of 522645396 is 693546225.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522645391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 334465 + ... + 336023.

It is an arithmetic number, because the mean of its divisors is an integer number (15695680).

Almost surely, 2^522645396 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 522645396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753392640).

522645396 is an abundant number, since it is smaller than the sum of its proper divisors (984139884).

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

522645396 is a wasteful number, since it uses less digits than its factorization.

522645396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893 (or 1891 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The square root of 522645396 is about 22861.4390623163. The cubic root of 522645396 is about 805.5064883551.

The spelling of 522645396 in words is "five hundred twenty-two million, six hundred forty-five thousand, three hundred ninety-six".