1628256506 has 8 divisors (see below), whose sum is σ = 2444435604. Its totient is φ = 813444640.

The previous prime is 1628256463. The next prime is 1628256517. The reversal of 1628256506 is 6056528261.

It can be written as a sum of positive squares in 2 ways, for example, as 1624815481 + 3441025 = 40309^2 + 1855^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338825 + ... + 343596.

Almost surely, 2^1628256506 is an apocalyptic number.

1628256506 is a deficient number, since it is larger than the sum of its proper divisors (816179098).

1628256506 is a wasteful number, since it uses less digits than its factorization.

1628256506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683616.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 1628256506 is about 40351.6605110620. The cubic root of 1628256506 is about 1176.4521670634.

The spelling of 1628256506 in words is "one billion, six hundred twenty-eight million, two hundred fifty-six thousand, five hundred six".