671376128 has 72 divisors (see below), whose sum is σ = 1376020800. Its totient is φ = 326836224.

The previous prime is 671376119. The next prime is 671376133. The reversal of 671376128 is 821673176.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1799750 + ... + 1800122.

It is an arithmetic number, because the mean of its divisors is an integer number (19111400).

Almost surely, 2^671376128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671376128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688010400).

671376128 is an abundant number, since it is smaller than the sum of its proper divisors (704644672).

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

671376128 is an equidigital number, since it uses as much as digits as its factorization.

671376128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 543 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 671376128 is about 25910.9268070442. The cubic root of 671376128 is about 875.6326865761.

The spelling of 671376128 in words is "six hundred seventy-one million, three hundred seventy-six thousand, one hundred twenty-eight".