628309340 has 12 divisors (see below), whose sum is σ = 1319449656. Its totient is φ = 251323728.

The previous prime is 628309337. The next prime is 628309351. The reversal of 628309340 is 43903826.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 628309340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15707714 + ... + 15707753.

It is an arithmetic number, because the mean of its divisors is an integer number (109954138).

Almost surely, 2^628309340 is an apocalyptic number.

It is an amenable number.

628309340 is an abundant number, since it is smaller than the sum of its proper divisors (691140316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628309340 is a wasteful number, since it uses less digits than its factorization.

628309340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31415476 (or 31415474 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 628309340 is about 25066.0994173405. The cubic root of 628309340 is about 856.4943555352.

The spelling of 628309340 in words is "six hundred twenty-eight million, three hundred nine thousand, three hundred forty".