1720746648 has 48 divisors (see below), whose sum is σ = 4712736600. Its totient is φ = 567135360.

The previous prime is 1720746617. The next prime is 1720746649. The reversal of 1720746648 is 8466470271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720746649) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 127858 + ... + 140673.

Almost surely, 2^1720746648 is an apocalyptic number.

1720746648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1720746648 is an abundant number, since it is smaller than the sum of its proper divisors (2991989952).

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

1720746648 is a wasteful number, since it uses less digits than its factorization.

1720746648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268632 (or 268625 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 1720746648 is about 41481.8833709368. The cubic root of 1720746648 is about 1198.3186285921.

The spelling of 1720746648 in words is "one billion, seven hundred twenty million, seven hundred forty-six thousand, six hundred forty-eight".