521839872 has 216 divisors, whose sum is σ = 1581565440. Its totient is φ = 165335040.

The previous prime is 521839867. The next prime is 521839937. The reversal of 521839872 is 278938125.

It is a happy number.

Its product of digits (241920) is a multiple of the sum of its prime divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6605529 + ... + 6605607.

Almost surely, 2^521839872 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 521839872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790782720).

521839872 is an abundant number, since it is smaller than the sum of its proper divisors (1059725568).

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

521839872 is a wasteful number, since it uses less digits than its factorization.

521839872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 192 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 521839872 is about 22843.8147427263. The cubic root of 521839872 is about 805.0924482641.

The spelling of 521839872 in words is "five hundred twenty-one million, eight hundred thirty-nine thousand, eight hundred seventy-two".