1721887488 has 108 divisors (see below), whose sum is σ = 5070575328. Its totient is φ = 561715200.

The previous prime is 1721887481. The next prime is 1721887493. The reversal of 1721887488 is 8847881271.

It is a happy number.

1721887488 is a `hidden beast` number, since 1 + 72 + 18 + 87 + 488 = 666.

It is not an unprimeable number, because it can be changed into a prime (1721887481) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 100338 + ... + 116238.

Almost surely, 2^1721887488 is an apocalyptic number.

1721887488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721887488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2535287664).

1721887488 is an abundant number, since it is smaller than the sum of its proper divisors (3348687840).

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

1721887488 is a wasteful number, since it uses less digits than its factorization.

1721887488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15970 (or 15953 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 54.

The square root of 1721887488 is about 41495.6321556860. The cubic root of 1721887488 is about 1198.5833950167.

The spelling of 1721887488 in words is "one billion, seven hundred twenty-one million, eight hundred eighty-seven thousand, four hundred eighty-eight".