628787225 has 48 divisors (see below), whose sum is σ = 898335360. Its totient is φ = 432115200.

The previous prime is 628787221. The next prime is 628787227. The reversal of 628787225 is 522787826.

It is not a de Polignac number, because 628787225 - 2² = 628787221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628787225.

It is not an unprimeable number, because it can be changed into a prime (628787221) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 562367 + ... + 563483.

It is an arithmetic number, because the mean of its divisors is an integer number (18715320).

Almost surely, 2^628787225 is an apocalyptic number.

It is an amenable number.

628787225 is a deficient number, since it is larger than the sum of its proper divisors (269548135).

628787225 is a wasteful number, since it uses less digits than its factorization.

628787225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1245 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The square root of 628787225 is about 25075.6301017542. The cubic root of 628787225 is about 856.7114471554.

The spelling of 628787225 in words is "six hundred twenty-eight million, seven hundred eighty-seven thousand, two hundred twenty-five".