628616938 has 8 divisors (see below), whose sum is σ = 992553120. Its totient is φ = 297765900.

The previous prime is 628616927. The next prime is 628616959. The reversal of 628616938 is 839616826.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 628616891 and 628616900.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8271238 + ... + 8271313.

It is an arithmetic number, because the mean of its divisors is an integer number (124069140).

Almost surely, 2^628616938 is an apocalyptic number.

628616938 is a deficient number, since it is larger than the sum of its proper divisors (363936182).

628616938 is a wasteful number, since it uses less digits than its factorization.

628616938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16542572.

The product of its digits is 746496, while the sum is 49.

The square root of 628616938 is about 25072.2344038181. The cubic root of 628616938 is about 856.6341025000.

The spelling of 628616938 in words is "six hundred twenty-eight million, six hundred sixteen thousand, nine hundred thirty-eight".