1628700005 has 4 divisors (see below), whose sum is σ = 1954440012. Its totient is φ = 1302960000.

The previous prime is 1628699987. The next prime is 1628700013. The reversal of 1628700005 is 5000078261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 355209409 + 1273490596 = 18847^2 + 35686^2 .

It is not a de Polignac number, because 1628700005 - 2²⁰ = 1627651429 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 3 ways as a sum of consecutive naturals, for example, 162869996 + ... + 162870005.

It is an arithmetic number, because the mean of its divisors is an integer number (488610003).

Almost surely, 2^1628700005 is an apocalyptic number.

It is an amenable number.

1628700005 is a deficient number, since it is larger than the sum of its proper divisors (325740007).

1628700005 is an equidigital number, since it uses as much as digits as its factorization.

1628700005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325740006.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1628700005 is about 40357.1555613128. The cubic root of 1628700005 is about 1176.5589700546.

Adding to 1628700005 its reverse (5000078261), we get a palindrome (6628778266).

The spelling of 1628700005 in words is "one billion, six hundred twenty-eight million, seven hundred thousand, five".