628771316 has 12 divisors (see below), whose sum is σ = 1165076388. Its totient is φ = 295892352.

The previous prime is 628771307. The next prime is 628771361. The reversal of 628771316 is 613177826.

It can be written as a sum of positive squares in 2 ways, for example, as 301161316 + 327610000 = 17354^2 + 18100^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4623251 + ... + 4623386.

It is an arithmetic number, because the mean of its divisors is an integer number (97089699).

Almost surely, 2^628771316 is an apocalyptic number.

It is an amenable number.

628771316 is a deficient number, since it is larger than the sum of its proper divisors (536305072).

628771316 is a wasteful number, since it uses less digits than its factorization.

628771316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246658 (or 9246656 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 628771316 is about 25075.3128794039. The cubic root of 628771316 is about 856.7042218510.

The spelling of 628771316 in words is "six hundred twenty-eight million, seven hundred seventy-one thousand, three hundred sixteen".