628697223 has 24 divisors (see below), whose sum is σ = 1132200576. Its totient is φ = 326595600.

The previous prime is 628697221. The next prime is 628697227. The reversal of 628697223 is 322796826.

It is not a de Polignac number, because 628697223 - 2¹ = 628697221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628697221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452913 + ... + 454298.

It is an arithmetic number, because the mean of its divisors is an integer number (47175024).

Almost surely, 2^628697223 is an apocalyptic number.

628697223 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

628697223 is a deficient number, since it is larger than the sum of its proper divisors (503503353).

628697223 is a wasteful number, since it uses less digits than its factorization.

628697223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907235 (or 907232 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 628697223 is about 25073.8354265956. The cubic root of 628697223 is about 856.6705698285.

The spelling of 628697223 in words is "six hundred twenty-eight million, six hundred ninety-seven thousand, two hundred twenty-three".