628683317 has 12 divisors (see below), whose sum is σ = 667212588. Its totient is φ = 591926400.

The previous prime is 628683301. The next prime is 628683323. The reversal of 628683317 is 713386826.

It can be written as a sum of positive squares in 2 ways, for example, as 382632721 + 246050596 = 19561^2 + 15686^2 .

It is not a de Polignac number, because 628683317 - 2⁴ = 628683301 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 (628683337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26717 + ... + 44397.

It is an arithmetic number, because the mean of its divisors is an integer number (55601049).

Almost surely, 2^628683317 is an apocalyptic number.

It is an amenable number.

628683317 is a deficient number, since it is larger than the sum of its proper divisors (38529271).

628683317 is a wasteful number, since it uses less digits than its factorization.

628683317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17780 (or 17749 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 628683317 is about 25073.5581240477. The cubic root of 628683317 is about 856.6642536197.

The spelling of 628683317 in words is "six hundred twenty-eight million, six hundred eighty-three thousand, three hundred seventeen".