671238996 has 12 divisors (see below), whose sum is σ = 1566224352. Its totient is φ = 223746328.

The previous prime is 671238991. The next prime is 671239021. The reversal of 671238996 is 699832176.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671238991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27968280 + ... + 27968303.

It is an arithmetic number, because the mean of its divisors is an integer number (130518696).

Almost surely, 2^671238996 is an apocalyptic number.

It is an amenable number.

671238996 is an abundant number, since it is smaller than the sum of its proper divisors (894985356).

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

671238996 is a wasteful number, since it uses less digits than its factorization.

671238996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55936590 (or 55936588 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 671238996 is about 25908.2804523959. The cubic root of 671238996 is about 875.5730650351.

The spelling of 671238996 in words is "six hundred seventy-one million, two hundred thirty-eight thousand, nine hundred ninety-six".