529840 has 40 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 205056.

The previous prime is 529829. The next prime is 529847. The reversal of 529840 is 48925.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 529799 and 529808.

It is not an unprimeable number, because it can be changed into a prime (529847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2871 + ... + 3049.

It is an arithmetic number, because the mean of its divisors is an integer number (31806).

2⁵²⁹⁸⁴⁰ 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 529840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636120).

529840 is an abundant number, since it is smaller than the sum of its proper divisors (742400).

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

529840 is a wasteful number, since it uses less digits than its factorization.

529840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 529840 is about 727.9010921822. The cubic root of 529840 is about 80.9185789564.

It can be divided in two parts, 529 and 840, that added together give a square (1369 = 37²).

The spelling of 529840 in words is "five hundred twenty-nine thousand, eight hundred forty".