671609982 has 32 divisors (see below), whose sum is σ = 1405428480. Its totient is φ = 213554880.

The previous prime is 671609941. The next prime is 671609989. The reversal of 671609982 is 289906176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671609989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45882 + ... + 58722.

It is an arithmetic number, because the mean of its divisors is an integer number (43919640).

Almost surely, 2^671609982 is an apocalyptic number.

671609982 is an abundant number, since it is smaller than the sum of its proper divisors (733818498).

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

671609982 is a wasteful number, since it uses less digits than its factorization.

671609982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13248.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 671609982 is about 25915.4390663172. The cubic root of 671609982 is about 875.7343416827.

The spelling of 671609982 in words is "six hundred seventy-one million, six hundred nine thousand, nine hundred eighty-two".