628664822 has 8 divisors (see below), whose sum is σ = 943164000. Its totient is φ = 314276824.

The previous prime is 628664821. The next prime is 628664851. The reversal of 628664822 is 228466826.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628664821) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11822 + ... + 37377.

It is an arithmetic number, because the mean of its divisors is an integer number (117895500).

Almost surely, 2^628664822 is an apocalyptic number.

628664822 is a deficient number, since it is larger than the sum of its proper divisors (314499178).

628664822 is a wasteful number, since it uses less digits than its factorization.

628664822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55590.

The product of its digits is 442368, while the sum is 44.

The square root of 628664822 is about 25073.1893065083. The cubic root of 628664822 is about 856.6558529086.

The spelling of 628664822 in words is "six hundred twenty-eight million, six hundred sixty-four thousand, eight hundred twenty-two".