628305814 has 4 divisors (see below), whose sum is σ = 942458724. Its totient is φ = 314152906.

The previous prime is 628305803. The next prime is 628305829. The reversal of 628305814 is 418503826.

It is a happy number.

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

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 as a sum of consecutive naturals, namely, 157076452 + ... + 157076455.

It is an arithmetic number, because the mean of its divisors is an integer number (235614681).

Almost surely, 2^628305814 is an apocalyptic number.

628305814 is a deficient number, since it is larger than the sum of its proper divisors (314152910).

628305814 is a wasteful number, since it uses less digits than its factorization.

628305814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314152909.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 628305814 is about 25066.0290832034. The cubic root of 628305814 is about 856.4927533495.

It can be divided in two parts, 62830 and 5814, that added together give a square (68644 = 262²).

The spelling of 628305814 in words is "six hundred twenty-eight million, three hundred five thousand, eight hundred fourteen".