987799560 has 128 divisors (see below), whose sum is σ = 3253340160. Its totient is φ = 237945600.

The previous prime is 987799543. The next prime is 987799609. The reversal of 987799560 is 65997789.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 987799494 and 987799503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212865 + ... + 217455.

It is an arithmetic number, because the mean of its divisors is an integer number (25416720).

Almost surely, 2^987799560 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 987799560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626670080).

987799560 is an abundant number, since it is smaller than the sum of its proper divisors (2265540600).

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

987799560 is a wasteful number, since it uses less digits than its factorization.

987799560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779 (or 4775 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 60.

The square root of 987799560 is about 31429.2787063273. The cubic root of 987799560 is about 995.9165346744.

The spelling of 987799560 in words is "nine hundred eighty-seven million, seven hundred ninety-nine thousand, five hundred sixty".