671400688 has 20 divisors (see below), whose sum is σ = 1486673200. Its totient is φ = 287743104.

The previous prime is 671400679. The next prime is 671400689. The reversal of 671400688 is 886004176.

It is a self number, because there is not a number n which added to its sum of digits gives 671400688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671400689) 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, 2997213 + ... + 2997436.

It is an arithmetic number, because the mean of its divisors is an integer number (74333660).

Almost surely, 2^671400688 is an apocalyptic number.

It is an amenable number.

671400688 is an abundant number, since it is smaller than the sum of its proper divisors (815272512).

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

671400688 is a wasteful number, since it uses less digits than its factorization.

671400688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994664 (or 5994658 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 671400688 is about 25911.4007340398. The cubic root of 671400688 is about 875.6433637885.

The spelling of 671400688 in words is "six hundred seventy-one million, four hundred thousand, six hundred eighty-eight".