168778072 has 16 divisors (see below), whose sum is σ = 316627200. Its totient is φ = 84344160.

The previous prime is 168778067. The next prime is 168778073. The reversal of 168778072 is 270877861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168778073) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14697 + ... + 23527.

It is an arithmetic number, because the mean of its divisors is an integer number (19789200).

Almost surely, 2^168778072 is an apocalyptic number.

It is an amenable number.

168778072 is a deficient number, since it is larger than the sum of its proper divisors (147849128).

168778072 is a wasteful number, since it uses less digits than its factorization.

168778072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11226 (or 11222 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 46.

The square root of 168778072 is about 12991.4615036184. The cubic root of 168778072 is about 552.6353655066.

The spelling of 168778072 in words is "one hundred sixty-eight million, seven hundred seventy-eight thousand, seventy-two".