628216624 has 20 divisors (see below), whose sum is σ = 1391051344. Its totient is φ = 269235648.

The previous prime is 628216619. The next prime is 628216739. The reversal of 628216624 is 426612826.

It is a super-2 number, since 2×628216624² = 789312253339914752, which contains 22 as substring.

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, 2804427 + ... + 2804650.

Almost surely, 2^628216624 is an apocalyptic number.

It is an amenable number.

628216624 is an abundant number, since it is smaller than the sum of its proper divisors (762834720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628216624 is a wasteful number, since it uses less digits than its factorization.

628216624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609092 (or 5609086 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 628216624 is about 25064.2499189583. The cubic root of 628216624 is about 856.4522241455.

The spelling of 628216624 in words is "six hundred twenty-eight million, two hundred sixteen thousand, six hundred twenty-four".