1628106909 has 24 divisors (see below), whose sum is σ = 2569649376. Its totient is φ = 910826400.

The previous prime is 1628106877. The next prime is 1628106919. The reversal of 1628106909 is 9096018261.

It is not a de Polignac number, because 1628106909 - 2⁵ = 1628106877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628106919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167787 + ... + 177224.

It is an arithmetic number, because the mean of its divisors is an integer number (107068724).

Almost surely, 2^1628106909 is an apocalyptic number.

It is an amenable number.

1628106909 is a deficient number, since it is larger than the sum of its proper divisors (941542467).

1628106909 is a wasteful number, since it uses less digits than its factorization.

1628106909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345049 (or 345038 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1628106909 is about 40349.8068025115. The cubic root of 1628106909 is about 1176.4161368875.

The spelling of 1628106909 in words is "one billion, six hundred twenty-eight million, one hundred six thousand, nine hundred nine".