671385528 has 96 divisors (see below), whose sum is σ = 1989187200. Its totient is φ = 202881600.

The previous prime is 671385527. The next prime is 671385563. The reversal of 671385528 is 825583176.

671385528 is a `hidden beast` number, since 67 + 1 + 38 + 552 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671385523) 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 23 ways as a sum of consecutive naturals, for example, 346723 + ... + 348653.

It is an arithmetic number, because the mean of its divisors is an integer number (20720700).

Almost surely, 2^671385528 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 671385528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994593600).

671385528 is an abundant number, since it is smaller than the sum of its proper divisors (1317801672).

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

671385528 is a wasteful number, since it uses less digits than its factorization.

671385528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393 (or 2386 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 671385528 is about 25911.1081970648. The cubic root of 671385528 is about 875.6367731621.

The spelling of 671385528 in words is "six hundred seventy-one million, three hundred eighty-five thousand, five hundred twenty-eight".