628319332 has 6 divisors (see below), whose sum is σ = 1099558838. Its totient is φ = 314159664.

The previous prime is 628319309. The next prime is 628319339. The reversal of 628319332 is 233913826.

It can be written as a sum of positive squares in only one way, i.e., 470716416 + 157602916 = 21696^2 + 12554^2 .

It is a junction number, because it is equal to n+sod(n) for n = 628319291 and 628319300.

It is not an unprimeable number, because it can be changed into a prime (628319339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78539913 + ... + 78539920.

Almost surely, 2^628319332 is an apocalyptic number.

It is an amenable number.

628319332 is a deficient number, since it is larger than the sum of its proper divisors (471239506).

628319332 is a wasteful number, since it uses less digits than its factorization.

628319332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157079837 (or 157079835 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 628319332 is about 25066.2987295692. The cubic root of 628319332 is about 856.4988957862.

The spelling of 628319332 in words is "six hundred twenty-eight million, three hundred nineteen thousand, three hundred thirty-two".