628697736 has 24 divisors (see below), whose sum is σ = 1702723230. Its totient is φ = 209565888.

The previous prime is 628697717. The next prime is 628697753. The reversal of 628697736 is 637796826.

628697736 is a `hidden beast` number, since 628 + 6 + 9 + 7 + 7 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 357436836 + 271260900 = 18906^2 + 16470^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 5 ways as a sum of consecutive naturals, for example, 4365885 + ... + 4366028.

Almost surely, 2^628697736 is an apocalyptic number.

It is an amenable number.

628697736 is an abundant number, since it is smaller than the sum of its proper divisors (1074025494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628697736 is a wasteful number, since it uses less digits than its factorization.

628697736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731925 (or 8731918 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 628697736 is about 25073.8456563807. The cubic root of 628697736 is about 856.6708028351.

The spelling of 628697736 in words is "six hundred twenty-eight million, six hundred ninety-seven thousand, seven hundred thirty-six".