6428681406 has 48 divisors (see below), whose sum is σ = 16120166400. Its totient is φ = 1813513104.

The previous prime is 6428681377. The next prime is 6428681443. The reversal of 6428681406 is 6041868246.

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, 312966 + ... + 332873.

It is an arithmetic number, because the mean of its divisors is an integer number (335836800).

Almost surely, 2^6428681406 is an apocalyptic number.

6428681406 is an abundant number, since it is smaller than the sum of its proper divisors (9691484994).

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

6428681406 is a wasteful number, since it uses less digits than its factorization.

6428681406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645933 (or 645930 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 6428681406 is about 80179.0584005574. The cubic root of 6428681406 is about 1859.4048859207.

The spelling of 6428681406 in words is "six billion, four hundred twenty-eight million, six hundred eighty-one thousand, four hundred six".