522073728 has 256 divisors, whose sum is σ = 1739059200. Its totient is φ = 152755200.

The previous prime is 522073687. The next prime is 522073763. The reversal of 522073728 is 827370225.

It is a happy number.

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 = 522073692 and 522073701.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1178275 + ... + 1178717.

It is an arithmetic number, because the mean of its divisors is an integer number (6793200).

Almost surely, 2^522073728 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 522073728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869529600).

522073728 is an abundant number, since it is smaller than the sum of its proper divisors (1216985472).

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

522073728 is a wasteful number, since it uses less digits than its factorization.

522073728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 522073728 is about 22848.9327540697. The cubic root of 522073728 is about 805.2126943346.

The spelling of 522073728 in words is "five hundred twenty-two million, seventy-three thousand, seven hundred twenty-eight".