628856187 has 8 divisors (see below), whose sum is σ = 845895504. Its totient is φ = 415527168.

The previous prime is 628856147. The next prime is 628856191. The reversal of 628856187 is 781658826.

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

It is not a de Polignac number, because 628856187 - 2¹⁶ = 628790651 is a prime.

It is a super-4 number, since 4×628856187⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (628856117) 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, 927178 + ... + 927855.

It is an arithmetic number, because the mean of its divisors is an integer number (105736938).

Almost surely, 2^628856187 is an apocalyptic number.

628856187 is a deficient number, since it is larger than the sum of its proper divisors (217039317).

628856187 is a wasteful number, since it uses less digits than its factorization.

628856187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855149.

The product of its digits is 1290240, while the sum is 51.

The square root of 628856187 is about 25077.0051441555. The cubic root of 628856187 is about 856.7427658446.

The spelling of 628856187 in words is "six hundred twenty-eight million, eight hundred fifty-six thousand, one hundred eighty-seven".