502440 has 64 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 129792.

The previous prime is 502429. The next prime is 502441. The reversal of 502440 is 44205.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (502441) by changing a digit.

502440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6321 + ... + 6399.

It is an arithmetic number, because the mean of its divisors is an integer number (24300).

2⁵⁰²⁴⁴⁰ 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 502440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777600).

502440 is an abundant number, since it is smaller than the sum of its proper divisors (1052760).

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

502440 is a wasteful number, since it uses less digits than its factorization.

502440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 502440 is about 708.8300219376. The cubic root of 502440 is about 79.4989517681.

Adding to 502440 its reverse (44205), we get a palindrome (546645).

The spelling of 502440 in words is "five hundred two thousand, four hundred forty".