521428032 has 84 divisors (see below), whose sum is σ = 1559600640. Its totient is φ = 166248192.

The previous prime is 521428031. The next prime is 521428043. The reversal of 521428032 is 230824125.

It is a junction number, because it is equal to n+sod(n) for n = 521427987 and 521428005.

It is not an unprimeable number, because it can be changed into a prime (521428031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6432 + ... + 32927.

Almost surely, 2^521428032 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 521428032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779800320).

521428032 is an abundant number, since it is smaller than the sum of its proper divisors (1038172608).

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

521428032 is a wasteful number, since it uses less digits than its factorization.

521428032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39400 (or 39387 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 521428032 is about 22834.7987072363. The cubic root of 521428032 is about 804.8805974930.

The spelling of 521428032 in words is "five hundred twenty-one million, four hundred twenty-eight thousand, thirty-two".