671088636 has 18 divisors (see below), whose sum is σ = 1696363032. Its totient is φ = 223696200.

The previous prime is 671088619. The next prime is 671088637. The reversal of 671088636 is 636880176.

671088636 is a `hidden beast` number, since 6 + 7 + 1 + 0 + 8 + 8 + 636 = 666.

671088636 is nontrivially palindromic in base 8.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 671088591 and 671088600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671088637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9320640 + ... + 9320711.

Almost surely, 2^671088636 is an apocalyptic number.

It is an amenable number.

671088636 is an abundant number, since it is smaller than the sum of its proper divisors (1025274396).

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

671088636 is a wasteful number, since it uses less digits than its factorization.

671088636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18641361 (or 18641356 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 671088636 is about 25905.3785148953. The cubic root of 671088636 is about 875.5076829590.

The spelling of 671088636 in words is "six hundred seventy-one million, eighty-eight thousand, six hundred thirty-six".