78886869 has 8 divisors (see below), whose sum is σ = 105245280. Its totient is φ = 52559856.

The previous prime is 78886867. The next prime is 78886891. The reversal of 78886869 is 96868887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78886869 - 2¹ = 78886867 is a prime.

It is a super-2 number, since 2×78886869² = 12446276201246322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78886867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174 + ... + 12615.

It is an arithmetic number, because the mean of its divisors is an integer number (13155660).

Almost surely, 2^78886869 is an apocalyptic number.

It is an amenable number.

78886869 is a deficient number, since it is larger than the sum of its proper divisors (26358411).

78886869 is a wasteful number, since it uses less digits than its factorization.

78886869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15699.

The product of its digits is 9289728, while the sum is 60.

The square root of 78886869 is about 8881.8280213028. The cubic root of 78886869 is about 428.8791233062.

The spelling of 78886869 in words is "seventy-eight million, eight hundred eighty-six thousand, eight hundred sixty-nine".