671953752 has 64 divisors (see below), whose sum is σ = 1870848000. Its totient is φ = 223467552.

The previous prime is 671953739. The next prime is 671953757. The reversal of 671953752 is 257359176.

671953752 is a `hidden beast` number, since 67 + 1 + 9 + 537 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 671953698 and 671953707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671953757) 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, 96649 + ... + 103367.

It is an arithmetic number, because the mean of its divisors is an integer number (29232000).

Almost surely, 2^671953752 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 671953752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935424000).

671953752 is an abundant number, since it is smaller than the sum of its proper divisors (1198894248).

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

671953752 is a wasteful number, since it uses less digits than its factorization.

671953752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7197 (or 7187 counting only the distinct ones).

The product of its digits is 396900, while the sum is 45.

The square root of 671953752 is about 25922.0707506171. The cubic root of 671953752 is about 875.8837338657.

The spelling of 671953752 in words is "six hundred seventy-one million, nine hundred fifty-three thousand, seven hundred fifty-two".