671428212 has 72 divisors (see below), whose sum is σ = 1938839616. Its totient is φ = 177076224.

The previous prime is 671428211. The next prime is 671428237. The reversal of 671428212 is 212824176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671428211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9453 + ... + 37844.

It is an arithmetic number, because the mean of its divisors is an integer number (26928328).

Almost surely, 2^671428212 is an apocalyptic number.

It is an amenable number.

671428212 is an abundant number, since it is smaller than the sum of its proper divisors (1267411404).

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

671428212 is a wasteful number, since it uses less digits than its factorization.

671428212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47337 (or 47322 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 671428212 is about 25911.9318461592. The cubic root of 671428212 is about 875.6553292606.

The spelling of 671428212 in words is "six hundred seventy-one million, four hundred twenty-eight thousand, two hundred twelve".