6424402440 has 64 divisors (see below), whose sum is σ = 19420378560. Its totient is φ = 1700092160.

The previous prime is 6424402429. The next prime is 6424402469. The reversal of 6424402440 is 442044246.

It is a super-2 number, since 2×6424402440² = 82545893422155907200, which contains 22 as substring.

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 = 6424402398 and 6424402407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188619 + ... + 220058.

It is an arithmetic number, because the mean of its divisors is an integer number (303443415).

Almost surely, 2^6424402440 is an apocalyptic number.

6424402440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6424402440 is an abundant number, since it is smaller than the sum of its proper divisors (12995976120).

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

6424402440 is a wasteful number, since it uses less digits than its factorization.

6424402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408822 (or 408818 counting only the distinct ones).

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

The square root of 6424402440 is about 80152.3701458666. The cubic root of 6424402440 is about 1858.9922509547.

Adding to 6424402440 its reverse (442044246), we get a palindrome (6866446686).

The spelling of 6424402440 in words is "six billion, four hundred twenty-four million, four hundred two thousand, four hundred forty".