986649856 has 36 divisors (see below), whose sum is σ = 1989799252. Its totient is φ = 488226816.

The previous prime is 986649827. The next prime is 986649863. The reversal of 986649856 is 658946689.

It can be written as a sum of positive squares in 2 ways, for example, as 731161600 + 255488256 = 27040^2 + 15984^2 .

It is a junction number, because it is equal to n+sod(n) for n = 986649794 and 986649803.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4966 + ... + 44698.

Almost surely, 2^986649856 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 986649856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994899626).

986649856 is an abundant number, since it is smaller than the sum of its proper divisors (1003149396).

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

986649856 is an equidigital number, since it uses as much as digits as its factorization.

986649856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39846 (or 39832 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 61.

The square root of 986649856 is about 31410.9830473355. The cubic root of 986649856 is about 995.5300008794.

The spelling of 986649856 in words is "nine hundred eighty-six million, six hundred forty-nine thousand, eight hundred fifty-six".