671350056 has 128 divisors (see below), whose sum is σ = 1866923520. Its totient is φ = 199874304.

The previous prime is 671350037. The next prime is 671350091. The reversal of 671350056 is 650053176.

It is a junction number, because it is equal to n+sod(n) for n = 671349999 and 671350026.

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 31 ways as a sum of consecutive naturals, for example, 2186655 + ... + 2186961.

It is an arithmetic number, because the mean of its divisors is an integer number (14585340).

Almost surely, 2^671350056 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 671350056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933461760).

671350056 is an abundant number, since it is smaller than the sum of its proper divisors (1195573464).

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

671350056 is a wasteful number, since it uses less digits than its factorization.

671350056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 671350056 is about 25910.4236939499. The cubic root of 671350056 is about 875.6213517520.

The spelling of 671350056 in words is "six hundred seventy-one million, three hundred fifty thousand, fifty-six".