68739858 has 72 divisors (see below), whose sum is σ = 168328524. Its totient is φ = 20243520.

The previous prime is 68739817. The next prime is 68739859. The reversal of 68739858 is 85893786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68608089 + 131769 = 8283^2 + 363^2 .

It is not an unprimeable number, because it can be changed into a prime (68739859) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 80160 + ... + 81012.

Almost surely, 2^68739858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68739858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84164262).

68739858 is an abundant number, since it is smaller than the sum of its proper divisors (99588666).

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

68739858 is a wasteful number, since it uses less digits than its factorization.

68739858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 906 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 68739858 is about 8290.9503677202. The cubic root of 68739858 is about 409.6404899307.

The spelling of 68739858 in words is "sixty-eight million, seven hundred thirty-nine thousand, eight hundred fifty-eight".