628463647 has 4 divisors (see below), whose sum is σ = 718244176. Its totient is φ = 538683120.

The previous prime is 628463629. The next prime is 628463659. The reversal of 628463647 is 746364826.

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-628463647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628463597 and 628463606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628463617) 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, 44890254 + ... + 44890267.

It is an arithmetic number, because the mean of its divisors is an integer number (179561044).

Almost surely, 2^628463647 is an apocalyptic number.

628463647 is a deficient number, since it is larger than the sum of its proper divisors (89780529).

628463647 is an equidigital number, since it uses as much as digits as its factorization.

628463647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89780528.

The product of its digits is 1161216, while the sum is 46.

The square root of 628463647 is about 25069.1772302164. The cubic root of 628463647 is about 856.5644655104.

The spelling of 628463647 in words is "six hundred twenty-eight million, four hundred sixty-three thousand, six hundred forty-seven".