628317814 has 4 divisors (see below), whose sum is σ = 942476724. Its totient is φ = 314158906.

The previous prime is 628317793. The next prime is 628317817. The reversal of 628317814 is 418713826.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628317817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157079452 + ... + 157079455.

It is an arithmetic number, because the mean of its divisors is an integer number (235619181).

Almost surely, 2^628317814 is an apocalyptic number.

628317814 is a deficient number, since it is larger than the sum of its proper divisors (314158910).

628317814 is a wasteful number, since it uses less digits than its factorization.

628317814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314158909.

The product of its digits is 64512, while the sum is 40.

The square root of 628317814 is about 25066.2684498511. The cubic root of 628317814 is about 856.4982060274.

The spelling of 628317814 in words is "six hundred twenty-eight million, three hundred seventeen thousand, eight hundred fourteen".