68187078 has 48 divisors (see below), whose sum is σ = 155325456. Its totient is φ = 21591360.

The previous prime is 68187071. The next prime is 68187089. The reversal of 68187078 is 87078186.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68187071) 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 23 ways as a sum of consecutive naturals, for example, 27448 + ... + 29828.

It is an arithmetic number, because the mean of its divisors is an integer number (3235947).

Almost surely, 2^68187078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68187078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77662728).

68187078 is an abundant number, since it is smaller than the sum of its proper divisors (87138378).

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

68187078 is a wasteful number, since it uses less digits than its factorization.

68187078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469 (or 2466 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 68187078 is about 8257.5467301130. The cubic root of 68187078 is about 408.5394752378.

The spelling of 68187078 in words is "sixty-eight million, one hundred eighty-seven thousand, seventy-eight".