628505684 has 12 divisors (see below), whose sum is σ = 1100788500. Its totient is φ = 313994688.

The previous prime is 628505677. The next prime is 628505699. The reversal of 628505684 is 486505826.

628505684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 620508100 + 7997584 = 24910^2 + 2828^2 .

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, 59009 + ... + 68840.

It is an arithmetic number, because the mean of its divisors is an integer number (91732375).

Almost surely, 2^628505684 is an apocalyptic number.

It is an amenable number.

628505684 is a deficient number, since it is larger than the sum of its proper divisors (472282816).

628505684 is a wasteful number, since it uses less digits than its factorization.

628505684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129082 (or 129080 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The square root of 628505684 is about 25070.0156362137. The cubic root of 628505684 is about 856.5835631929.

The spelling of 628505684 in words is "six hundred twenty-eight million, five hundred five thousand, six hundred eighty-four".