68081394 has 16 divisors (see below), whose sum is σ = 140555520. Its totient is φ = 21961680.

The previous prime is 68081393. The next prime is 68081399. The reversal of 68081394 is 49318086.

It is not an unprimeable number, because it can be changed into a prime (68081393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182829 + ... + 183200.

It is an arithmetic number, because the mean of its divisors is an integer number (8784720).

Almost surely, 2^68081394 is an apocalyptic number.

68081394 is an abundant number, since it is smaller than the sum of its proper divisors (72474126).

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

68081394 is a wasteful number, since it uses less digits than its factorization.

68081394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366065.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 68081394 is about 8251.1450114514. The cubic root of 68081394 is about 408.3282992947.

The spelling of 68081394 in words is "sixty-eight million, eighty-one thousand, three hundred ninety-four".