628147 has 8 divisors (see below), whose sum is σ = 682640. Its totient is φ = 574560.

The previous prime is 628139. The next prime is 628171. The reversal of 628147 is 741826.

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 628147 - 2³ = 628139 is a prime.

It is a Duffinian number.

628147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (628127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2629 + ... + 2857.

It is an arithmetic number, because the mean of its divisors is an integer number (85330).

2⁶²⁸¹⁴⁷ is an apocalyptic number.

628147 is a deficient number, since it is larger than the sum of its proper divisors (54493).

628147 is a wasteful number, since it uses less digits than its factorization.

628147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453.

The product of its digits is 2688, while the sum is 28.

The square root of 628147 is about 792.5572534524. The cubic root of 628147 is about 85.6420583344.

It can be divided in two parts, 6281 and 47, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 628147 in words is "six hundred twenty-eight thousand, one hundred forty-seven".