628223132 has 12 divisors (see below), whose sum is σ = 1099910280. Its totient is φ = 313963056.

The previous prime is 628223129. The next prime is 628223147. The reversal of 628223132 is 231322826.

It is a junction number, because it is equal to n+sod(n) for n = 628223095 and 628223104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27323 + ... + 44754.

It is an arithmetic number, because the mean of its divisors is an integer number (91659190).

Almost surely, 2^628223132 is an apocalyptic number.

It is an amenable number.

628223132 is a deficient number, since it is larger than the sum of its proper divisors (471687148).

628223132 is a wasteful number, since it uses less digits than its factorization.

628223132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74260 (or 74258 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 628223132 is about 25064.3797449688. The cubic root of 628223132 is about 856.4551816029.

Adding to 628223132 its reverse (231322826), we get a palindrome (859545958).

The spelling of 628223132 in words is "six hundred twenty-eight million, two hundred twenty-three thousand, one hundred thirty-two".