521838936 has 160 divisors (see below), whose sum is σ = 1563978240. Its totient is φ = 161989632.

The previous prime is 521838929. The next prime is 521838949. The reversal of 521838936 is 639838125.

It is a happy number.

521838936 is a `hidden beast` number, since 521 + 8 + 38 + 93 + 6 = 666.

It is a super-2 number, since 2×521838936² = 544631750251224192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521838891 and 521838900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1398846 + ... + 1399218.

It is an arithmetic number, because the mean of its divisors is an integer number (9774864).

Almost surely, 2^521838936 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 521838936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781989120).

521838936 is an abundant number, since it is smaller than the sum of its proper divisors (1042139304).

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

521838936 is a wasteful number, since it uses less digits than its factorization.

521838936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 522 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 521838936 is about 22843.7942557711. The cubic root of 521838936 is about 805.0919669114.

The spelling of 521838936 in words is "five hundred twenty-one million, eight hundred thirty-eight thousand, nine hundred thirty-six".