6424404240 has 40 divisors (see below), whose sum is σ = 19915653888. Its totient is φ = 1713174400.

The previous prime is 6424404221. The next prime is 6424404253. The reversal of 6424404240 is 424044246.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6424404198 and 6424404207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13383936 + ... + 13384415.

Almost surely, 2^6424404240 is an apocalyptic number.

6424404240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6424404240 is an abundant number, since it is smaller than the sum of its proper divisors (13491249648).

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

6424404240 is a wasteful number, since it uses less digits than its factorization.

6424404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26768367 (or 26768361 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

The square root of 6424404240 is about 80152.3813744794. The cubic root of 6424404240 is about 1858.9924245733.

Adding to 6424404240 its reverse (424044246), we get a palindrome (6848448486).

The spelling of 6424404240 in words is "six billion, four hundred twenty-four million, four hundred four thousand, two hundred forty".