6728213040 has 40 divisors (see below), whose sum is σ = 20857461168. Its totient is φ = 1794190080.

The previous prime is 6728213033. The next prime is 6728213059. The reversal of 6728213040 is 403128276.

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

It is a junction number, because it is equal to n+sod(n) for n = 6728212992 and 6728213010.

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, 14016871 + ... + 14017350.

Almost surely, 2^6728213040 is an apocalyptic number.

6728213040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6728213040 is an abundant number, since it is smaller than the sum of its proper divisors (14129248128).

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

6728213040 is a wasteful number, since it uses less digits than its factorization.

6728213040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28034237 (or 28034231 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 6728213040 is about 82025.6852455376. The cubic root of 6728213040 is about 1887.8460610747.

The spelling of 6728213040 in words is "six billion, seven hundred twenty-eight million, two hundred thirteen thousand, forty".