68304656 has 80 divisors (see below), whose sum is σ = 158466048. Its totient is φ = 27907200.

The previous prime is 68304631. The next prime is 68304667. The reversal of 68304656 is 65640386.

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, 357521 + ... + 357711.

Almost surely, 2^68304656 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 68304656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79233024).

68304656 is an abundant number, since it is smaller than the sum of its proper divisors (90161392).

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

68304656 is a wasteful number, since it uses less digits than its factorization.

68304656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 68304656 is about 8264.6630905319. The cubic root of 68304656 is about 408.7741613028.

The spelling of 68304656 in words is "sixty-eight million, three hundred four thousand, six hundred fifty-six".