1968656 has 20 divisors (see below), whose sum is σ = 3908604. Its totient is φ = 960000.

The previous prime is 1968641. The next prime is 1968679. The reversal of 1968656 is 6568691.

It can be written as a sum of positive squares in 2 ways, for example, as 490000 + 1478656 = 700^2 + 1216^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845 + ... + 2156.

2^1968656 is an apocalyptic number.

1968656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1968656 is a deficient number, since it is larger than the sum of its proper divisors (1939948).

1968656 is a wasteful number, since it uses less digits than its factorization.

1968656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050 (or 3044 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 1968656 is about 1403.0880228981. The cubic root of 1968656 is about 125.3304536333.

The spelling of 1968656 in words is "one million, nine hundred sixty-eight thousand, six hundred fifty-six".