628009306 has 8 divisors (see below), whose sum is σ = 945956160. Its totient is φ = 312690588.

The previous prime is 628009301. The next prime is 628009307. The reversal of 628009306 is 603900826.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (628009301) 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, 656436 + ... + 657391.

It is an arithmetic number, because the mean of its divisors is an integer number (118244520).

Almost surely, 2^628009306 is an apocalyptic number.

628009306 is a deficient number, since it is larger than the sum of its proper divisors (317946854).

628009306 is a wasteful number, since it uses less digits than its factorization.

628009306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314068.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 628009306 is about 25060.1138465092. The cubic root of 628009306 is about 856.3580010750.

The spelling of 628009306 in words is "six hundred twenty-eight million, nine thousand, three hundred six".