68127138 has 24 divisors (see below), whose sum is σ = 151599708. Its totient is φ = 22095072.

The previous prime is 68127107. The next prime is 68127139. The reversal of 68127138 is 83172186.

It can be written as a sum of positive squares in 2 ways, for example, as 68112009 + 15129 = 8253^2 + 123^2 .

It is not an unprimeable number, because it can be changed into a prime (68127139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50481 + ... + 51812.

Almost surely, 2^68127138 is an apocalyptic number.

68127138 is an abundant number, since it is smaller than the sum of its proper divisors (83472570).

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

68127138 is a wasteful number, since it uses less digits than its factorization.

68127138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102338 (or 102335 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 68127138 is about 8253.9165248990. The cubic root of 68127138 is about 408.4197309708.

It can be divided in two parts, 68127 and 138, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 68127138 in words is "sixty-eight million, one hundred twenty-seven thousand, one hundred thirty-eight".