628427643 has 8 divisors (see below), whose sum is σ = 874334208. Its totient is φ = 400736424.

The previous prime is 628427633. The next prime is 628427669. The reversal of 628427643 is 346724826.

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

It is not a de Polignac number, because 628427643 - 2²² = 624233339 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 628427595 and 628427604.

It is not an unprimeable number, because it can be changed into a prime (628427633) 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, 4553755 + ... + 4553892.

It is an arithmetic number, because the mean of its divisors is an integer number (109291776).

Almost surely, 2^628427643 is an apocalyptic number.

628427643 is a deficient number, since it is larger than the sum of its proper divisors (245906565).

628427643 is a wasteful number, since it uses less digits than its factorization.

628427643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9107673.

The product of its digits is 387072, while the sum is 42.

The square root of 628427643 is about 25068.4591269587. The cubic root of 628427643 is about 856.5481079819.

The spelling of 628427643 in words is "six hundred twenty-eight million, four hundred twenty-seven thousand, six hundred forty-three".