68019738 has 16 divisors (see below), whose sum is σ = 139358016. Its totient is φ = 22120160.

The previous prime is 68019733. The next prime is 68019739. The reversal of 68019738 is 83791086.

It is a self number, because there is not a number n which added to its sum of digits gives 68019738.

It is not an unprimeable number, because it can be changed into a prime (68019733) 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, 138006 + ... + 138497.

It is an arithmetic number, because the mean of its divisors is an integer number (8709876).

Almost surely, 2^68019738 is an apocalyptic number.

68019738 is an abundant number, since it is smaller than the sum of its proper divisors (71338278).

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

68019738 is a wasteful number, since it uses less digits than its factorization.

68019738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276549.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 68019738 is about 8247.4079564430. The cubic root of 68019738 is about 408.2049983852.

The spelling of 68019738 in words is "sixty-eight million, nineteen thousand, seven hundred thirty-eight".