6404039489 has 16 divisors (see below), whose sum is σ = 6702981120. Its totient is φ = 6111078480.

The previous prime is 6404039461. The next prime is 6404039501. The reversal of 6404039489 is 9849304046.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404039489 is a prime.

It is a super-2 number, since 2×6404039489² = 82023443553342762242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6404039429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2905862 + ... + 2908064.

It is an arithmetic number, because the mean of its divisors is an integer number (418936320).

Almost surely, 2^6404039489 is an apocalyptic number.

It is an amenable number.

6404039489 is a deficient number, since it is larger than the sum of its proper divisors (298941631).

6404039489 is a wasteful number, since it uses less digits than its factorization.

6404039489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 6404039489 is about 80025.2428237491. The cubic root of 6404039489 is about 1857.0260689384.

The spelling of 6404039489 in words is "six billion, four hundred four million, thirty-nine thousand, four hundred eighty-nine".