628856471 has 8 divisors (see below), whose sum is σ = 663046320. Its totient is φ = 594775872.

The previous prime is 628856453. The next prime is 628856497. The reversal of 628856471 is 174658826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628856471 is a prime.

It is a super-3 number, since 3×628856471³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628856411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15350 + ... + 38643.

It is an arithmetic number, because the mean of its divisors is an integer number (82880790).

Almost surely, 2^628856471 is an apocalyptic number.

628856471 is a deficient number, since it is larger than the sum of its proper divisors (34189849).

628856471 is a wasteful number, since it uses less digits than its factorization.

628856471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54625.

The product of its digits is 645120, while the sum is 47.

The square root of 628856471 is about 25077.0108067130. The cubic root of 628856471 is about 856.7428948168.

The spelling of 628856471 in words is "six hundred twenty-eight million, eight hundred fifty-six thousand, four hundred seventy-one".