6728433426 has 128 divisors (see below), whose sum is σ = 17940787200. Its totient is φ = 1841935680.

The previous prime is 6728433419. The next prime is 6728433469. The reversal of 6728433426 is 6243348276.

It is a super-2 number, since 2×6728433426² = 90543632736228194952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 353665 + ... + 372203.

It is an arithmetic number, because the mean of its divisors is an integer number (140162400).

Almost surely, 2^6728433426 is an apocalyptic number.

6728433426 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6728433426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8970393600).

6728433426 is an abundant number, since it is smaller than the sum of its proper divisors (11212353774).

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

6728433426 is a wasteful number, since it uses less digits than its factorization.

6728433426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18621 (or 18615 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 45.

The square root of 6728433426 is about 82027.0286308117. The cubic root of 6728433426 is about 1887.8666732986.

The spelling of 6728433426 in words is "six billion, seven hundred twenty-eight million, four hundred thirty-three thousand, four hundred twenty-six".