671213952 has 160 divisors (see below), whose sum is σ = 2047537800. Its totient is φ = 218142720.

The previous prime is 671213867. The next prime is 671213957. The reversal of 671213952 is 259312176.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671213957) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 424299 + ... + 425877.

Almost surely, 2^671213952 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 671213952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023768900).

671213952 is an abundant number, since it is smaller than the sum of its proper divisors (1376323848).

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

671213952 is a wasteful number, since it uses less digits than its factorization.

671213952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1625 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 671213952 is about 25907.7971275058. The cubic root of 671213952 is about 875.5621756576.

The spelling of 671213952 in words is "six hundred seventy-one million, two hundred thirteen thousand, nine hundred fifty-two".