628800671 has 4 divisors (see below), whose sum is σ = 629067144. Its totient is φ = 628534200.

The previous prime is 628800661. The next prime is 628800673. The reversal of 628800671 is 176008826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628800671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628800673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129665 + ... + 134426.

It is an arithmetic number, because the mean of its divisors is an integer number (157266786).

Almost surely, 2^628800671 is an apocalyptic number.

628800671 is a deficient number, since it is larger than the sum of its proper divisors (266473).

628800671 is a wasteful number, since it uses less digits than its factorization.

628800671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266472.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 628800671 is about 25075.8982092367. The cubic root of 628800671 is about 856.7175537574.

The spelling of 628800671 in words is "six hundred twenty-eight million, eight hundred thousand, six hundred seventy-one".