628747308 has 72 divisors (see below), whose sum is σ = 1818750752. Its totient is φ = 179407872.

The previous prime is 628747291. The next prime is 628747309. The reversal of 628747308 is 803747826.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (628747309) 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, 310716 + ... + 312732.

Almost surely, 2^628747308 is an apocalyptic number.

It is an amenable number.

628747308 is an abundant number, since it is smaller than the sum of its proper divisors (1190003444).

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

628747308 is a wasteful number, since it uses less digits than its factorization.

628747308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271 (or 3266 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 628747308 is about 25074.8341569790. The cubic root of 628747308 is about 856.6933180368.

The spelling of 628747308 in words is "six hundred twenty-eight million, seven hundred forty-seven thousand, three hundred eight".