628665068 has 6 divisors (see below), whose sum is σ = 1100163876. Its totient is φ = 314332532.

The previous prime is 628665047. The next prime is 628665097. The reversal of 628665068 is 860566826.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78583130 + ... + 78583137.

It is an arithmetic number, because the mean of its divisors is an integer number (183360646).

Almost surely, 2^628665068 is an apocalyptic number.

It is an amenable number.

628665068 is a deficient number, since it is larger than the sum of its proper divisors (471498808).

628665068 is a wasteful number, since it uses less digits than its factorization.

628665068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157166271 (or 157166269 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 628665068 is about 25073.1942121462. The cubic root of 628665068 is about 856.6559646467.

The spelling of 628665068 in words is "six hundred twenty-eight million, six hundred sixty-five thousand, sixty-eight".