6404043888 has 120 divisors (see below), whose sum is σ = 20701929456. Its totient is φ = 1826457600.

The previous prime is 6404043859. The next prime is 6404043907. The reversal of 6404043888 is 8883404046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91983 + ... + 145838.

Almost surely, 2^6404043888 is an apocalyptic number.

6404043888 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6404043888 is an abundant number, since it is smaller than the sum of its proper divisors (14297885568).

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

6404043888 is a wasteful number, since it uses less digits than its factorization.

6404043888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237863 (or 237854 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The square root of 6404043888 is about 80025.2703088218. The cubic root of 6404043888 is about 1857.0264941417.

The spelling of 6404043888 in words is "six billion, four hundred four million, forty-three thousand, eight hundred eighty-eight".