628550993 has 8 divisors (see below), whose sum is σ = 719969088. Its totient is φ = 537539184.

The previous prime is 628550941. The next prime is 628551029. The reversal of 628550993 is 399055826.

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

It is not a de Polignac number, because 628550993 - 2¹⁴ = 628534609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628250993) 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 7 ways as a sum of consecutive naturals, for example, 98246 + ... + 104447.

It is an arithmetic number, because the mean of its divisors is an integer number (89996136).

Almost surely, 2^628550993 is an apocalyptic number.

It is an amenable number.

628550993 is a deficient number, since it is larger than the sum of its proper divisors (91418095).

628550993 is a wasteful number, since it uses less digits than its factorization.

628550993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203143.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 628550993 is about 25070.9192691453. The cubic root of 628550993 is about 856.6041464128.

The spelling of 628550993 in words is "six hundred twenty-eight million, five hundred fifty thousand, nine hundred ninety-three".