628729819 has 8 divisors (see below), whose sum is σ = 672179040. Its totient is φ = 585998976.

The previous prime is 628729799. The next prime is 628729861. The reversal of 628729819 is 918927826.

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

It is not a de Polignac number, because 628729819 - 2⁹ = 628729307 is a prime.

It is a super-2 number, since 2×628729819² = 790602370599545522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628723819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177784 + ... + 181285.

It is an arithmetic number, because the mean of its divisors is an integer number (84022380).

Almost surely, 2^628729819 is an apocalyptic number.

628729819 is a deficient number, since it is larger than the sum of its proper divisors (43449221).

628729819 is a wasteful number, since it uses less digits than its factorization.

628729819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359189.

The product of its digits is 870912, while the sum is 52.

The square root of 628729819 is about 25074.4854184488. The cubic root of 628729819 is about 856.6853748095.

The spelling of 628729819 in words is "six hundred twenty-eight million, seven hundred twenty-nine thousand, eight hundred nineteen".