424240 has 20 divisors (see below), whose sum is σ = 986544. Its totient is φ = 169664.

The previous prime is 424231. The next prime is 424243. The reversal of 424240 is 42424.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (424243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2572 + ... + 2731.

2⁴²⁴²⁴⁰ is an apocalyptic number.

424240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

424240 is an abundant number, since it is smaller than the sum of its proper divisors (562304).

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

424240 is a wasteful number, since it uses less digits than its factorization.

424240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316 (or 5310 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 424240 is about 651.3370863079. The cubic root of 424240 is about 75.1398870740.

Adding to 424240 its reverse (42424), we get a palindrome (466664).

The spelling of 424240 in words is "four hundred twenty-four thousand, two hundred forty", and thus it is an iban number.