628434785 has 64 divisors (see below), whose sum is σ = 909792000. Its totient is φ = 411586560.

The previous prime is 628434743. The next prime is 628434799. The reversal of 628434785 is 587434826.

628434785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 628434785 - 2²⁸ = 359999329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2697029 + ... + 2697261.

It is an arithmetic number, because the mean of its divisors is an integer number (14215500).

Almost surely, 2^628434785 is an apocalyptic number.

It is an amenable number.

628434785 is a deficient number, since it is larger than the sum of its proper divisors (281357215).

628434785 is a wasteful number, since it uses less digits than its factorization.

628434785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its digits is 1290240, while the sum is 47.

The square root of 628434785 is about 25068.6015764741. The cubic root of 628434785 is about 856.5513528230.

The spelling of 628434785 in words is "six hundred twenty-eight million, four hundred thirty-four thousand, seven hundred eighty-five".