628531105 has 8 divisors (see below), whose sum is σ = 755561664. Its totient is φ = 501942000.

The previous prime is 628531103. The next prime is 628531147. The reversal of 628531105 is 501135826.

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

It is not a de Polignac number, because 628531105 - 2¹ = 628531103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628531103) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 107221 + ... + 112930.

It is an arithmetic number, because the mean of its divisors is an integer number (94445208).

Almost surely, 2^628531105 is an apocalyptic number.

It is an amenable number.

628531105 is a deficient number, since it is larger than the sum of its proper divisors (127030559).

628531105 is a wasteful number, since it uses less digits than its factorization.

628531105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220727.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 628531105 is about 25070.5226311699. The cubic root of 628531105 is about 856.5951117054.

The spelling of 628531105 in words is "six hundred twenty-eight million, five hundred thirty-one thousand, one hundred five".