630628673 has 8 divisors (see below), whose sum is σ = 638037480. Its totient is φ = 623260800.

The previous prime is 630628627. The next prime is 630628679. The reversal of 630628673 is 376826036.

It can be written as a sum of positive squares in 4 ways, for example, as 208860304 + 421768369 = 14452^2 + 20537^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 630628673 - 2⁸ = 630628417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 630628673.

It is not an unprimeable number, because it can be changed into a prime (630628679) 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, 21323 + ... + 41423.

It is an arithmetic number, because the mean of its divisors is an integer number (79754685).

Almost surely, 2^630628673 is an apocalyptic number.

It is an amenable number.

630628673 is a deficient number, since it is larger than the sum of its proper divisors (7408807).

630628673 is a wasteful number, since it uses less digits than its factorization.

630628673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20467.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 630628673 is about 25112.3211392336. The cubic root of 630628673 is about 857.5469454985.

The spelling of 630628673 in words is "six hundred thirty million, six hundred twenty-eight thousand, six hundred seventy-three".