523940 has 48 divisors (see below), whose sum is σ = 1233792. Its totient is φ = 185856.

The previous prime is 523937. The next prime is 523949. The reversal of 523940 is 49325.

523940 = T₃₂ + T₃₃ + ... + T₁₄₆.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (523949) 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 15 ways as a sum of consecutive naturals, for example, 7787 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (25704).

2⁵²³⁹⁴⁰ 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 523940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616896).

523940 is an abundant number, since it is smaller than the sum of its proper divisors (709852).

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

523940 is a wasteful number, since it uses less digits than its factorization.

523940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 523940 is about 723.8369982254. The cubic root of 523940 is about 80.6171025656.

The spelling of 523940 in words is "five hundred twenty-three thousand, nine hundred forty".