628996635 has 12 divisors (see below), whose sum is σ = 1090260912. Its totient is φ = 335464848.

The previous prime is 628996609. The next prime is 628996637. The reversal of 628996635 is 536699826.

628996635 is a `hidden beast` number, since 628 + 9 + 9 + 6 + 6 + 3 + 5 = 666.

It is not a de Polignac number, because 628996635 - 2⁷ = 628996507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628996637) 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, 6988807 + ... + 6988896.

It is an arithmetic number, because the mean of its divisors is an integer number (90855076).

Almost surely, 2^628996635 is an apocalyptic number.

628996635 is a deficient number, since it is larger than the sum of its proper divisors (461264277).

628996635 is a wasteful number, since it uses less digits than its factorization.

628996635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13977714 (or 13977711 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 628996635 is about 25079.8053222109. The cubic root of 628996635 is about 856.8065424036.

The spelling of 628996635 in words is "six hundred twenty-eight million, nine hundred ninety-six thousand, six hundred thirty-five".