628549223 has 4 divisors (see below), whose sum is σ = 630939408. Its totient is φ = 626159040.

The previous prime is 628549217. The next prime is 628549237. The reversal of 628549223 is 322945826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628549223 - 2²⁶ = 561440359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628549213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194698 + ... + 1195223.

It is an arithmetic number, because the mean of its divisors is an integer number (157734852).

Almost surely, 2^628549223 is an apocalyptic number.

628549223 is a deficient number, since it is larger than the sum of its proper divisors (2390185).

628549223 is a wasteful number, since it uses less digits than its factorization.

628549223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390184.

The product of its digits is 207360, while the sum is 41.

The square root of 628549223 is about 25070.8839692580. The cubic root of 628549223 is about 856.6033423461.

The spelling of 628549223 in words is "six hundred twenty-eight million, five hundred forty-nine thousand, two hundred twenty-three".