78130869 has 16 divisors (see below), whose sum is σ = 109990080. Its totient is φ = 49332816.

The previous prime is 78130859. The next prime is 78130879. The reversal of 78130869 is 96803187.

It is an interprime number because it is at equal distance from previous prime (78130859) and next prime (78130879).

It is not a de Polignac number, because 78130869 - 2⁵ = 78130837 is a prime.

It is a super-2 number, since 2×78130869² = 12208865381390322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78130869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78130859) 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 15 ways as a sum of consecutive naturals, for example, 18679 + ... + 22475.

It is an arithmetic number, because the mean of its divisors is an integer number (6874380).

Almost surely, 2^78130869 is an apocalyptic number.

It is an amenable number.

78130869 is a deficient number, since it is larger than the sum of its proper divisors (31859211).

78130869 is an equidigital number, since it uses as much as digits as its factorization.

78130869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 78130869 is about 8839.1667593727. The cubic root of 78130869 is about 427.5046913065.

The spelling of 78130869 in words is "seventy-eight million, one hundred thirty thousand, eight hundred sixty-nine".