628664806 has 32 divisors (see below), whose sum is σ = 1199692800. Its totient is φ = 244931400.

The previous prime is 628664801. The next prime is 628664807. The reversal of 628664806 is 608466826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628664801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34110 + ... + 49201.

It is an arithmetic number, because the mean of its divisors is an integer number (37490400).

Almost surely, 2^628664806 is an apocalyptic number.

628664806 is a deficient number, since it is larger than the sum of its proper divisors (571027994).

628664806 is a wasteful number, since it uses less digits than its factorization.

628664806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83345 (or 83331 counting only the distinct ones).

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

The square root of 628664806 is about 25073.1889874423. The cubic root of 628664806 is about 856.6558456411.

The spelling of 628664806 in words is "six hundred twenty-eight million, six hundred sixty-four thousand, eight hundred six".