1648823840 has 24 divisors (see below), whose sum is σ = 3895346700. Its totient is φ = 659529472.

The previous prime is 1648823791. The next prime is 1648823887. The reversal of 1648823840 is 483288461.

It can be written as a sum of positive squares in 2 ways, for example, as 1535699344 + 113124496 = 39188^2 + 10636^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1648823791 and 1648823800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5152415 + ... + 5152734.

Almost surely, 2^1648823840 is an apocalyptic number.

1648823840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648823840 is an abundant number, since it is smaller than the sum of its proper divisors (2246522860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1648823840 is a wasteful number, since it uses less digits than its factorization.

1648823840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10305164 (or 10305156 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 1648823840 is about 40605.7119134735. The cubic root of 1648823840 is about 1181.3849103959.

The spelling of 1648823840 in words is "one billion, six hundred forty-eight million, eight hundred twenty-three thousand, eight hundred forty".