1986256 has 20 divisors (see below), whose sum is σ = 3939232. Its totient is φ = 969696.

The previous prime is 1986253. The next prime is 1986277. The reversal of 1986256 is 6526891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 756 + ... + 2131.

2^1986256 is an apocalyptic number.

1986256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1986256 is a deficient number, since it is larger than the sum of its proper divisors (1952976).

1986256 is a wasteful number, since it uses less digits than its factorization.

1986256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938 (or 2932 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 1986256 is about 1409.3459475941. The cubic root of 1986256 is about 125.7028354388.

The spelling of 1986256 in words is "one million, nine hundred eighty-six thousand, two hundred fifty-six".