1968558 has 8 divisors (see below), whose sum is σ = 3937128. Its totient is φ = 656184.

The previous prime is 1968541. The next prime is 1968563. The reversal of 1968558 is 8558691.

It is a sphenic number, since it is the product of 3 distinct primes.

1968558 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 164041 + ... + 164052.

It is an arithmetic number, because the mean of its divisors is an integer number (492141).

2^1968558 is an apocalyptic number.

1968558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1968558 is a wasteful number, since it uses less digits than its factorization.

1968558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328098.

The product of its digits is 86400, while the sum is 42.

The square root of 1968558 is about 1403.0530994941. The cubic root of 1968558 is about 125.3283739424.

The spelling of 1968558 in words is "one million, nine hundred sixty-eight thousand, five hundred fifty-eight".