987799442688 has 720 divisors, whose sum is σ = 3285570731520. Its totient is φ = 293740204032.

The previous prime is 987799442687. The next prime is 987799442701. The reversal of 987799442688 is 886244997789.

987799442688 is a `hidden beast` number, since 9 + 8 + 7 + 7 + 99 + 442 + 6 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

Its product of digits (3511517184) is a multiple of the sum of its prime factors (1764).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987799442683) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 607128531 + ... + 607130157.

Almost surely, 2^987799442688 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 987799442688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642785365760).

987799442688 is an abundant number, since it is smaller than the sum of its proper divisors (2297771288832).

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

987799442688 is a wasteful number, since it uses less digits than its factorization.

987799442688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 1741 counting only the distinct ones).

The product of its digits is 3511517184, while the sum is 81.

The spelling of 987799442688 in words is "nine hundred eighty-seven billion, seven hundred ninety-nine million, four hundred forty-two thousand, six hundred eighty-eight".