68191284 has 108 divisors (see below), whose sum is σ = 196882784. Its totient is φ = 17991168.

The previous prime is 68191273. The next prime is 68191309. The reversal of 68191284 is 48219186.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 1286602 + ... + 1286654.

Almost surely, 2^68191284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68191284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98441392).

68191284 is an abundant number, since it is smaller than the sum of its proper divisors (128691500).

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

68191284 is a wasteful number, since it uses less digits than its factorization.

68191284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 82 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 68191284 is about 8257.8014023104. The cubic root of 68191284 is about 408.5478750781.

The spelling of 68191284 in words is "sixty-eight million, one hundred ninety-one thousand, two hundred eighty-four".