68178870 has 24 divisors (see below), whose sum is σ = 177265296. Its totient is φ = 18181008.

The previous prime is 68178853. The next prime is 68178871. The reversal of 68178870 is 7887186.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68178871) 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, 378682 + ... + 378861.

It is an arithmetic number, because the mean of its divisors is an integer number (7386054).

Almost surely, 2^68178870 is an apocalyptic number.

68178870 is an abundant number, since it is smaller than the sum of its proper divisors (109086426).

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

68178870 is a wasteful number, since it uses less digits than its factorization.

68178870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757556 (or 757553 counting only the distinct ones).

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

The square root of 68178870 is about 8257.0497152433. The cubic root of 68178870 is about 408.5230819725.

The spelling of 68178870 in words is "sixty-eight million, one hundred seventy-eight thousand, eight hundred seventy".