68242656 has 96 divisors (see below), whose sum is σ = 193148928. Its totient is φ = 21035520.

The previous prime is 68242639. The next prime is 68242667. The reversal of 68242656 is 65624286.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67950 + ... + 68946.

It is an arithmetic number, because the mean of its divisors is an integer number (2011968).

Almost surely, 2^68242656 is an apocalyptic number.

68242656 is the 4416-th nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68242656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96574464).

68242656 is an abundant number, since it is smaller than the sum of its proper divisors (124906272).

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

68242656 is a wasteful number, since it uses less digits than its factorization.

68242656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1056 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 68242656 is about 8260.9113298715. The cubic root of 68242656 is about 408.6504426986.

The spelling of 68242656 in words is "sixty-eight million, two hundred forty-two thousand, six hundred fifty-six".