671050072 has 64 divisors (see below), whose sum is σ = 1583504640. Its totient is φ = 258979200.

The previous prime is 671050043. The next prime is 671050123. The reversal of 671050072 is 270050176.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 671050072.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60822 + ... + 71002.

It is an arithmetic number, because the mean of its divisors is an integer number (24742260).

Almost surely, 2^671050072 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 671050072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791752320).

671050072 is an abundant number, since it is smaller than the sum of its proper divisors (912454568).

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

671050072 is a wasteful number, since it uses less digits than its factorization.

671050072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10312 (or 10308 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 671050072 is about 25904.6341800073. The cubic root of 671050072 is about 875.4909123352.

The spelling of 671050072 in words is "six hundred seventy-one million, fifty thousand, seventy-two".