68138070 has 128 divisors (see below), whose sum is σ = 219663360. Its totient is φ = 13063680.

The previous prime is 68138051. The next prime is 68138087. The reversal of 68138070 is 7083186.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28896 + ... + 31164.

It is an arithmetic number, because the mean of its divisors is an integer number (1716120).

Almost surely, 2^68138070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68138070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109831680).

68138070 is an abundant number, since it is smaller than the sum of its proper divisors (151525290).

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

68138070 is a wasteful number, since it uses less digits than its factorization.

68138070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 68138070 is about 8254.5787294083. The cubic root of 68138070 is about 408.4415754508.

The spelling of 68138070 in words is "sixty-eight million, one hundred thirty-eight thousand, seventy".