1986288 has 20 divisors (see below), whose sum is σ = 5131368. Its totient is φ = 662080.

The previous prime is 1986277. The next prime is 1986289. The reversal of 1986288 is 8826891.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20643 + ... + 20738.

2^1986288 is an apocalyptic number.

It is an amenable number.

1986288 is an abundant number, since it is smaller than the sum of its proper divisors (3145080).

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

1986288 is a wasteful number, since it uses less digits than its factorization.

1986288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41392 (or 41386 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 1986288 is about 1409.3573003323. The cubic root of 1986288 is about 125.7035104893.

The spelling of 1986288 in words is "one million, nine hundred eighty-six thousand, two hundred eighty-eight".