671717228 has 48 divisors (see below), whose sum is σ = 1451729664. Its totient is φ = 264824640.

The previous prime is 671717219. The next prime is 671717237. The reversal of 671717228 is 822717176.

It is an interprime number because it is at equal distance from previous prime (671717219) and next prime (671717237).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108743 + ... + 114753.

It is an arithmetic number, because the mean of its divisors is an integer number (30244368).

Almost surely, 2^671717228 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 671717228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725864832).

671717228 is an abundant number, since it is smaller than the sum of its proper divisors (780012436).

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

671717228 is a wasteful number, since it uses less digits than its factorization.

671717228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342 (or 6340 counting only the distinct ones).

The product of its digits is 65856, while the sum is 41.

The square root of 671717228 is about 25917.5081363931. The cubic root of 671717228 is about 875.7809530638.

The spelling of 671717228 in words is "six hundred seventy-one million, seven hundred seventeen thousand, two hundred twenty-eight".