987861056 has 112 divisors (see below), whose sum is σ = 2447665920. Its totient is φ = 385136640.

The previous prime is 987861047. The next prime is 987861071. The reversal of 987861056 is 650168789.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×987861056² = 1951738931922870272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 987860995 and 987861013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412310 + ... + 414698.

It is an arithmetic number, because the mean of its divisors is an integer number (21854160).

Almost surely, 2^987861056 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 987861056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1223832960).

987861056 is an abundant number, since it is smaller than the sum of its proper divisors (1459804864).

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

987861056 is a wasteful number, since it uses less digits than its factorization.

987861056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492 (or 2482 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 987861056 is about 31430.2570145393. The cubic root of 987861056 is about 995.9372013545.

The spelling of 987861056 in words is "nine hundred eighty-seven million, eight hundred sixty-one thousand, fifty-six".