628009646 has 8 divisors (see below), whose sum is σ = 1027652184. Its totient is φ = 285458920.

The previous prime is 628009633. The next prime is 628009673. The reversal of 628009646 is 646900826.

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

It is a super-2 number, since 2×628009646² = 788792230938090632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14272925 + ... + 14272968.

It is an arithmetic number, because the mean of its divisors is an integer number (128456523).

Almost surely, 2^628009646 is an apocalyptic number.

628009646 is a deficient number, since it is larger than the sum of its proper divisors (399642538).

628009646 is a wasteful number, since it uses less digits than its factorization.

628009646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28545906.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 628009646 is about 25060.1206301965. The cubic root of 628009646 is about 856.3581556171.

The spelling of 628009646 in words is "six hundred twenty-eight million, nine thousand, six hundred forty-six".