628658471 has 16 divisors (see below), whose sum is σ = 750933504. Its totient is φ = 514577184.

The previous prime is 628658467. The next prime is 628658477. The reversal of 628658471 is 174856826.

It is a cyclic number.

It is not a de Polignac number, because 628658471 - 2² = 628658467 is a prime.

It is a super-3 number, since 3×628658471³ (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 (628658477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107105 + ... + 112821.

It is an arithmetic number, because the mean of its divisors is an integer number (46933344).

Almost surely, 2^628658471 is an apocalyptic number.

628658471 is a deficient number, since it is larger than the sum of its proper divisors (122275033).

628658471 is a wasteful number, since it uses less digits than its factorization.

628658471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6430.

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

The square root of 628658471 is about 25073.0626569631. The cubic root of 628658471 is about 856.6529681496.

The spelling of 628658471 in words is "six hundred twenty-eight million, six hundred fifty-eight thousand, four hundred seventy-one".