628637845 has 8 divisors (see below), whose sum is σ = 822944160. Its totient is φ = 457191120.

The previous prime is 628637833. The next prime is 628637869. The reversal of 628637845 is 548736826.

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

It is not a de Polignac number, because 628637845 - 2⁹ = 628637333 is a prime.

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, 5714835 + ... + 5714944.

It is an arithmetic number, because the mean of its divisors is an integer number (102868020).

Almost surely, 2^628637845 is an apocalyptic number.

It is an amenable number.

628637845 is a deficient number, since it is larger than the sum of its proper divisors (194306315).

628637845 is a wasteful number, since it uses less digits than its factorization.

628637845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11429795.

The product of its digits is 1935360, while the sum is 49.

The square root of 628637845 is about 25072.6513356685. The cubic root of 628637845 is about 856.6435992483.

The spelling of 628637845 in words is "six hundred twenty-eight million, six hundred thirty-seven thousand, eight hundred forty-five".