1487217664 has 88 divisors (see below), whose sum is σ = 3234341880. Its totient is φ = 680656896.

The previous prime is 1487217649. The next prime is 1487217689. The reversal of 1487217664 is 4667127841.

It can be written as a sum of positive squares in 4 ways, for example, as 985457664 + 501760000 = 31392^2 + 22400^2 .

It is a super-2 number, since 2×1487217664² = 4423632760227233792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642942 + ... + 645250.

It is an arithmetic number, because the mean of its divisors is an integer number (36753885).

Almost surely, 2^1487217664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1487217664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617170940).

1487217664 is an abundant number, since it is smaller than the sum of its proper divisors (1747124216).

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

1487217664 is a wasteful number, since it uses less digits than its factorization.

1487217664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383 (or 2365 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 1487217664 is about 38564.4611527245. The cubic root of 1487217664 is about 1141.4533797120.

The spelling of 1487217664 in words is "one billion, four hundred eighty-seven million, two hundred seventeen thousand, six hundred sixty-four".