78207568 has 20 divisors (see below), whose sum is σ = 154097280. Its totient is φ = 38440544.

The previous prime is 78207557. The next prime is 78207587. The reversal of 78207568 is 86570287.

It is a happy number.

It is a super-2 number, since 2×78207568² = 12232847384949248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40480 + ... + 42367.

It is an arithmetic number, because the mean of its divisors is an integer number (7704864).

Almost surely, 2^78207568 is an apocalyptic number.

It is an amenable number.

78207568 is a deficient number, since it is larger than the sum of its proper divisors (75889712).

78207568 is a wasteful number, since it uses less digits than its factorization.

78207568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82914 (or 82908 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 78207568 is about 8843.5042828055. The cubic root of 78207568 is about 427.6445355583.

It can be divided in two parts, 7820 and 7568, that multiplied together give a triangular number (59181760 = T₁₀₈₇₉).

The spelling of 78207568 in words is "seventy-eight million, two hundred seven thousand, five hundred sixty-eight".