1905666848 has 18 divisors (see below), whose sum is σ = 3752267841. Its totient is φ = 952709952.

The previous prime is 1905666823. The next prime is 1905666853. The reversal of 1905666848 is 8486665091.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1905497104 + 169744 = 43652^2 + 412^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=30868.

It is a super-2 number, since 2×1905666848² = 7263132271132510208, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1905666848.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 243086 + ... + 250802.

Almost surely, 2^1905666848 is an apocalyptic number.

It is an amenable number.

1905666848 is a deficient number, since it is larger than the sum of its proper divisors (1846600993).

1905666848 is an frugal number, since it uses more digits than its factorization.

1905666848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15444 (or 7719 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 1905666848 is about 43653.9442433327. The cubic root of 1905666848 is about 1239.7924661350.

The spelling of 1905666848 in words is "one billion, nine hundred five million, six hundred sixty-six thousand, eight hundred forty-eight".