628961165 has 8 divisors (see below), whose sum is σ = 862575360. Its totient is φ = 431287632.

The previous prime is 628961153. The next prime is 628961167. The reversal of 628961165 is 561169826.

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 628961165 - 2⁴ = 628961149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628961167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8985125 + ... + 8985194.

It is an arithmetic number, because the mean of its divisors is an integer number (107821920).

Almost surely, 2^628961165 is an apocalyptic number.

It is an amenable number.

628961165 is a deficient number, since it is larger than the sum of its proper divisors (233614195).

628961165 is a wasteful number, since it uses less digits than its factorization.

628961165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17970331.

The product of its digits is 155520, while the sum is 44.

The square root of 628961165 is about 25079.0981695913. The cubic root of 628961165 is about 856.7904365944.

The spelling of 628961165 in words is "six hundred twenty-eight million, nine hundred sixty-one thousand, one hundred sixty-five".