78868867 has 64 divisors (see below), whose sum is σ = 112066560. Its totient is φ = 53654400.

The previous prime is 78868843. The next prime is 78868873. The reversal of 78868867 is 76886887.

It is a cyclic number.

It is not a de Polignac number, because 78868867 - 2¹⁹ = 78344579 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (78868807) 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 63 ways as a sum of consecutive naturals, for example, 1678038 + ... + 1678084.

It is an arithmetic number, because the mean of its divisors is an integer number (1751040).

Almost surely, 2^78868867 is an apocalyptic number.

78868867 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78868867 is a deficient number, since it is larger than the sum of its proper divisors (33197693).

78868867 is a wasteful number, since it uses less digits than its factorization.

78868867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152.

The product of its digits is 7225344, while the sum is 58.

The square root of 78868867 is about 8880.8145459749. The cubic root of 78868867 is about 428.8464973891.

The spelling of 78868867 in words is "seventy-eight million, eight hundred sixty-eight thousand, eight hundred sixty-seven".