628654253 has 4 divisors (see below), whose sum is σ = 640515708. Its totient is φ = 616792800.

The previous prime is 628654249. The next prime is 628654297. The reversal of 628654253 is 352456826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352456826 = 2 ⋅176228413.

It can be written as a sum of positive squares in 2 ways, for example, as 515380804 + 113273449 = 22702^2 + 10643^2 .

It is not a de Polignac number, because 628654253 - 2² = 628654249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628654253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628674253) 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 3 ways as a sum of consecutive naturals, for example, 5930648 + ... + 5930753.

It is an arithmetic number, because the mean of its divisors is an integer number (160128927).

Almost surely, 2^628654253 is an apocalyptic number.

It is an amenable number.

628654253 is a deficient number, since it is larger than the sum of its proper divisors (11861455).

628654253 is a wasteful number, since it uses less digits than its factorization.

628654253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11861454.

The product of its digits is 345600, while the sum is 41.

The square root of 628654253 is about 25072.9785426463. The cubic root of 628654253 is about 856.6510522336.

The spelling of 628654253 in words is "six hundred twenty-eight million, six hundred fifty-four thousand, two hundred fifty-three".