78163768 has 8 divisors (see below), whose sum is σ = 146557080. Its totient is φ = 39081880.

The previous prime is 78163759. The next prime is 78163769. The reversal of 78163768 is 86736187.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78163768² = 12219149255915648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78163769) 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 as a sum of consecutive naturals, namely, 4885228 + ... + 4885243.

It is an arithmetic number, because the mean of its divisors is an integer number (18319635).

Almost surely, 2^78163768 is an apocalyptic number.

It is an amenable number.

78163768 is a deficient number, since it is larger than the sum of its proper divisors (68393312).

78163768 is a wasteful number, since it uses less digits than its factorization.

78163768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770477 (or 9770473 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 78163768 is about 8841.0275420903. The cubic root of 78163768 is about 427.5646868133.

The spelling of 78163768 in words is "seventy-eight million, one hundred sixty-three thousand, seven hundred sixty-eight".