68189958 has 64 divisors (see below), whose sum is σ = 163296000. Its totient is φ = 21013632.

The previous prime is 68189861. The next prime is 68189971. The reversal of 68189958 is 85998186.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 53533 + ... + 54791.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 2^68189958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68189958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81648000).

68189958 is an abundant number, since it is smaller than the sum of its proper divisors (95106042).

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

68189958 is a wasteful number, since it uses less digits than its factorization.

68189958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 1340 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 68189958 is about 8257.7211142058. The cubic root of 68189958 is about 408.5452269489.

The spelling of 68189958 in words is "sixty-eight million, one hundred eighty-nine thousand, nine hundred fifty-eight".