671368128 has 28 divisors (see below), whose sum is σ = 1776328680. Its totient is φ = 223789312.

The previous prime is 671368127. The next prime is 671368129. The reversal of 671368128 is 821863176.

It is an interprime number because it is at equal distance from previous prime (671368127) and next prime (671368129).

It is a self number, because there is not a number n which added to its sum of digits gives 671368128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671368121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748163 + ... + 1748546.

It is an arithmetic number, because the mean of its divisors is an integer number (63440310).

Almost surely, 2^671368128 is an apocalyptic number.

It is an amenable number.

671368128 is an abundant number, since it is smaller than the sum of its proper divisors (1104960552).

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

671368128 is a wasteful number, since it uses less digits than its factorization.

671368128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496724 (or 3496714 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 671368128 is about 25910.7724315583. The cubic root of 671368128 is about 875.6292086005.

The spelling of 671368128 in words is "six hundred seventy-one million, three hundred sixty-eight thousand, one hundred twenty-eight".