628626825 has 30 divisors (see below), whose sum is σ = 1164437934. Its totient is φ = 335266560.

The previous prime is 628626821. The next prime is 628626851. The reversal of 628626825 is 528626826.

It can be written as a sum of positive squares in 3 ways, for example, as 155825289 + 472801536 = 12483^2 + 21744^2 .

It is not a de Polignac number, because 628626825 - 2² = 628626821 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (628626821) 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 29 ways as a sum of consecutive naturals, for example, 153192 + ... + 157241.

Almost surely, 2^628626825 is an apocalyptic number.

It is an amenable number.

628626825 is a deficient number, since it is larger than the sum of its proper divisors (535811109).

628626825 is a wasteful number, since it uses less digits than its factorization.

628626825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310455 (or 310441 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 628626825 is about 25072.4315733437. The cubic root of 628626825 is about 856.6385935747.

Subtracting from 628626825 its reverse (528626826), we obtain a palindrome (99999999).

The spelling of 628626825 in words is "six hundred twenty-eight million, six hundred twenty-six thousand, eight hundred twenty-five".