520940 has 36 divisors (see below), whose sum is σ = 1271088. Its totient is φ = 175680.

The previous prime is 520921. The next prime is 520943. The reversal of 520940 is 49025.

520940 = T₉₉ + T₁₀₀ + ... + T₁₅₉.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (520943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8510 + ... + 8570.

It is an arithmetic number, because the mean of its divisors is an integer number (35308).

2⁵²⁰⁹⁴⁰ 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 520940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635544).

520940 is an abundant number, since it is smaller than the sum of its proper divisors (750148).

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

520940 is a wasteful number, since it uses less digits than its factorization.

520940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 520940 is about 721.7617335382. The cubic root of 520940 is about 80.4629409041.

Adding to 520940 its reverse (49025), we get a palindrome (569965).

The spelling of 520940 in words is "five hundred twenty thousand, nine hundred forty".