68399994 has 32 divisors (see below), whose sum is σ = 147780864. Its totient is φ = 20980800.

The previous prime is 68399983. The next prime is 68400001. The reversal of 68399994 is 49999386.

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, 27919 + ... + 30269.

It is an arithmetic number, because the mean of its divisors is an integer number (4618152).

Almost surely, 2^68399994 is an apocalyptic number.

68399994 is an abundant number, since it is smaller than the sum of its proper divisors (79380870).

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

68399994 is a wasteful number, since it uses less digits than its factorization.

68399994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its digits is 3779136, while the sum is 57.

The square root of 68399994 is about 8270.4288885160. The cubic root of 68399994 is about 408.9642586080.

The spelling of 68399994 in words is "sixty-eight million, three hundred ninety-nine thousand, nine hundred ninety-four".