628022361 has 4 divisors (see below), whose sum is σ = 837363152. Its totient is φ = 418681572.

The previous prime is 628022341. The next prime is 628022377. The reversal of 628022361 is 163220826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 628022361 - 2⁷ = 628022233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628022321) 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 3 ways as a sum of consecutive naturals, for example, 104670391 + ... + 104670396.

It is an arithmetic number, because the mean of its divisors is an integer number (209340788).

Almost surely, 2^628022361 is an apocalyptic number.

It is an amenable number.

628022361 is a deficient number, since it is larger than the sum of its proper divisors (209340791).

628022361 is a wasteful number, since it uses less digits than its factorization.

628022361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209340790.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 628022361 is about 25060.3743188325. The cubic root of 628022361 is about 856.3639349978.

The spelling of 628022361 in words is "six hundred twenty-eight million, twenty-two thousand, three hundred sixty-one".