424040240 has 80 divisors (see below), whose sum is σ = 1066244256. Its totient is φ = 155904000.

The previous prime is 424040237. The next prime is 424040249. The reversal of 424040240 is 42040424.

It is a tau number, because it is divible by the number of its divisors (80).

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 (424040249) 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, 291515 + ... + 292965.

Almost surely, 2^424040240 is an apocalyptic number.

424040240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424040240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533122128).

424040240 is an abundant number, since it is smaller than the sum of its proper divisors (642204016).

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

424040240 is a wasteful number, since it uses less digits than its factorization.

424040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758 (or 1752 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 424040240 is about 20592.2373723692. The cubic root of 424040240 is about 751.2809162777.

Adding to 424040240 its reverse (42040424), we get a palindrome (466080664).

The spelling of 424040240 in words is "four hundred twenty-four million, forty thousand, two hundred forty".