628965776 has 20 divisors (see below), whose sum is σ = 1219518300. Its totient is φ = 314251392.

The previous prime is 628965761. The next prime is 628965817. The reversal of 628965776 is 677569826.

It can be written as a sum of positive squares in 2 ways, for example, as 37503376 + 591462400 = 6124^2 + 24320^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9110 + ... + 36618.

It is an arithmetic number, because the mean of its divisors is an integer number (60975915).

Almost surely, 2^628965776 is an apocalyptic number.

It is an amenable number.

628965776 is a deficient number, since it is larger than the sum of its proper divisors (590552524).

628965776 is a wasteful number, since it uses less digits than its factorization.

628965776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28946 (or 28940 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 56.

The square root of 628965776 is about 25079.1900985658. The cubic root of 628965776 is about 856.7925303385.

The spelling of 628965776 in words is "six hundred twenty-eight million, nine hundred sixty-five thousand, seven hundred seventy-six".