628321965 has 8 divisors (see below), whose sum is σ = 1005315168. Its totient is φ = 335105040.

The previous prime is 628321957. The next prime is 628321999. The reversal of 628321965 is 569123826.

628321965 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 628321965 - 2³ = 628321957 is a prime.

It is a super-2 number, since 2×628321965² = 789576983402922450, which contains 22 as substring.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20944051 + ... + 20944080.

It is an arithmetic number, because the mean of its divisors is an integer number (125664396).

Almost surely, 2^628321965 is an apocalyptic number.

It is an amenable number.

628321965 is a deficient number, since it is larger than the sum of its proper divisors (376993203).

628321965 is a wasteful number, since it uses less digits than its factorization.

628321965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41888139.

The product of its digits is 155520, while the sum is 42.

The square root of 628321965 is about 25066.3512502319. The cubic root of 628321965 is about 856.5000921834.

The spelling of 628321965 in words is "six hundred twenty-eight million, three hundred twenty-one thousand, nine hundred sixty-five".