628197707 has 4 divisors (see below), whose sum is σ = 642807000. Its totient is φ = 613588416.

The previous prime is 628197677. The next prime is 628197709. The reversal of 628197707 is 707791826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628197707 - 2¹⁰ = 628196683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628197709) 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, 7304582 + ... + 7304667.

It is an arithmetic number, because the mean of its divisors is an integer number (160701750).

Almost surely, 2^628197707 is an apocalyptic number.

628197707 is a deficient number, since it is larger than the sum of its proper divisors (14609293).

628197707 is a wasteful number, since it uses less digits than its factorization.

628197707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14609292.

The product of its (nonzero) digits is 296352, while the sum is 47.

The square root of 628197707 is about 25063.8725459575. The cubic root of 628197707 is about 856.4436274986.

The spelling of 628197707 in words is "six hundred twenty-eight million, one hundred ninety-seven thousand, seven hundred seven".