628064686 has 8 divisors (see below), whose sum is σ = 942573384. Its totient is φ = 313873560.

The previous prime is 628064669. The next prime is 628064699. The reversal of 628064686 is 686460826.

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

It is a congruent number.

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, 74385 + ... + 82396.

It is an arithmetic number, because the mean of its divisors is an integer number (117821673).

Almost surely, 2^628064686 is an apocalyptic number.

628064686 is a deficient number, since it is larger than the sum of its proper divisors (314508698).

628064686 is a wasteful number, since it uses less digits than its factorization.

628064686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158786.

The product of its (nonzero) digits is 663552, while the sum is 46.

The square root of 628064686 is about 25061.2187652556. The cubic root of 628064686 is about 856.3831725237.

The spelling of 628064686 in words is "six hundred twenty-eight million, sixty-four thousand, six hundred eighty-six".