628659225 has 36 divisors (see below), whose sum is σ = 1167713456. Its totient is φ = 335281680.

The previous prime is 628659223. The next prime is 628659233. The reversal of 628659225 is 522956826.

It is not a de Polignac number, because 628659225 - 2¹ = 628659223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628659221) 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 35 ways as a sum of consecutive naturals, for example, 45667 + ... + 57816.

Almost surely, 2^628659225 is an apocalyptic number.

It is an amenable number.

628659225 is a deficient number, since it is larger than the sum of its proper divisors (539054231).

628659225 is a wasteful number, since it uses less digits than its factorization.

628659225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103508 (or 103491 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 628659225 is about 25073.0776930157. The cubic root of 628659225 is about 856.6533106334.

The spelling of 628659225 in words is "six hundred twenty-eight million, six hundred fifty-nine thousand, two hundred twenty-five".