628330405 has 16 divisors (see below), whose sum is σ = 774094464. Its totient is φ = 489343680.

The previous prime is 628330397. The next prime is 628330427. The reversal of 628330405 is 504033826.

It is not a de Polignac number, because 628330405 - 2³ = 628330397 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 62167 + ... + 71563.

It is an arithmetic number, because the mean of its divisors is an integer number (48380904).

Almost surely, 2^628330405 is an apocalyptic number.

It is an amenable number.

628330405 is a deficient number, since it is larger than the sum of its proper divisors (145764059).

628330405 is a wasteful number, since it uses less digits than its factorization.

628330405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9756.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 628330405 is about 25066.5196028487. The cubic root of 628330405 is about 856.5039271750.

The spelling of 628330405 in words is "six hundred twenty-eight million, three hundred thirty thousand, four hundred five".