628773871 has 8 divisors (see below), whose sum is σ = 690044544. Its totient is φ = 568188120.

The previous prime is 628773869. The next prime is 628773949. The reversal of 628773871 is 178377826.

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

It is a cyclic number.

It is not a de Polignac number, because 628773871 - 2¹ = 628773869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628773811) 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, 169305 + ... + 172978.

It is an arithmetic number, because the mean of its divisors is an integer number (86255568).

Almost surely, 2^628773871 is an apocalyptic number.

628773871 is a deficient number, since it is larger than the sum of its proper divisors (61270673).

628773871 is a wasteful number, since it uses less digits than its factorization.

628773871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342461.

The product of its digits is 790272, while the sum is 49.

The square root of 628773871 is about 25075.3638258750. The cubic root of 628773871 is about 856.7053822497.

The spelling of 628773871 in words is "six hundred twenty-eight million, seven hundred seventy-three thousand, eight hundred seventy-one".