628426508 has 24 divisors (see below), whose sum is σ = 1113794640. Its totient is φ = 310210560.

The previous prime is 628426457. The next prime is 628426517. The reversal of 628426508 is 805624826.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409703 + ... + 411233.

It is an arithmetic number, because the mean of its divisors is an integer number (46408110).

Almost surely, 2^628426508 is an apocalyptic number.

It is an amenable number.

628426508 is a deficient number, since it is larger than the sum of its proper divisors (485368132).

628426508 is a wasteful number, since it uses less digits than its factorization.

628426508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777 (or 2775 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 628426508 is about 25068.4364889396. The cubic root of 628426508 is about 856.5475923125.

The spelling of 628426508 in words is "six hundred twenty-eight million, four hundred twenty-six thousand, five hundred eight".