671851312 has 40 divisors (see below), whose sum is σ = 1425279312. Its totient is φ = 304262400.

The previous prime is 671851259. The next prime is 671851319. The reversal of 671851312 is 213158176.

It is a happy number.

It is a super-2 number, since 2×671851312² = 902768370872242688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671851319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41862 + ... + 55642.

Almost surely, 2^671851312 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 671851312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712639656).

671851312 is an abundant number, since it is smaller than the sum of its proper divisors (753428000).

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

671851312 is a wasteful number, since it uses less digits than its factorization.

671851312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14077 (or 14071 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 671851312 is about 25920.0947529132. The cubic root of 671851312 is about 875.8392218293.

The spelling of 671851312 in words is "six hundred seventy-one million, eight hundred fifty-one thousand, three hundred twelve".