68068644 has 36 divisors (see below), whose sum is σ = 184759344. Its totient is φ = 19448016.

The previous prime is 68068639. The next prime is 68068657. The reversal of 68068644 is 44686086.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 68068596 and 68068605.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57294 + ... + 58469.

It is an arithmetic number, because the mean of its divisors is an integer number (5132204).

Almost surely, 2^68068644 is an apocalyptic number.

It is an amenable number.

68068644 is an abundant number, since it is smaller than the sum of its proper divisors (116690700).

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

68068644 is a wasteful number, since it uses less digits than its factorization.

68068644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115784 (or 115775 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 68068644 is about 8250.3723552334. The cubic root of 68068644 is about 408.3028076954.

The spelling of 68068644 in words is "sixty-eight million, sixty-eight thousand, six hundred forty-four".