1721488898 has 8 divisors (see below), whose sum is σ = 2585427660. Its totient is φ = 859679680.

The previous prime is 1721488883. The next prime is 1721488907. The reversal of 1721488898 is 8988841271.

It can be written as a sum of positive squares in 2 ways, for example, as 1391812249 + 329676649 = 37307^2 + 18157^2 .

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, 530363 + ... + 533598.

Almost surely, 2^1721488898 is an apocalyptic number.

1721488898 is a deficient number, since it is larger than the sum of its proper divisors (863938762).

1721488898 is a wasteful number, since it uses less digits than its factorization.

1721488898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064772.

The product of its digits is 2064384, while the sum is 56.

The square root of 1721488898 is about 41490.8290830636. The cubic root of 1721488898 is about 1198.4909034482.

The spelling of 1721488898 in words is "one billion, seven hundred twenty-one million, four hundred eighty-eight thousand, eight hundred ninety-eight".