1986560 has 52 divisors (see below), whose sum is σ = 4816308. Its totient is φ = 786432.

The previous prime is 1986553. The next prime is 1986577. The reversal of 1986560 is 656891.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 1183744 = 896^2 + 1088^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1986560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20432 + ... + 20528.

2^1986560 is an apocalyptic number.

1986560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2408154).

1986560 is an abundant number, since it is smaller than the sum of its proper divisors (2829748).

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

1986560 is an frugal number, since it uses more digits than its factorization.

1986560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1986560 is about 1409.4537949149. The cubic root of 1986560 is about 125.7092481256.

The spelling of 1986560 in words is "one million, nine hundred eighty-six thousand, five hundred sixty".