78820041 has 16 divisors (see below), whose sum is σ = 111570048. Its totient is φ = 49324800.

The previous prime is 78820039. The next prime is 78820043. The reversal of 78820041 is 14002887.

It is an interprime number because it is at equal distance from previous prime (78820039) and next prime (78820043).

It is not a de Polignac number, because 78820041 - 2¹ = 78820039 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78819990 and 78820008.

It is not an unprimeable number, because it can be changed into a prime (78820043) 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, 19636 + ... + 23306.

It is an arithmetic number, because the mean of its divisors is an integer number (6973128).

Almost surely, 2^78820041 is an apocalyptic number.

It is an amenable number.

78820041 is a deficient number, since it is larger than the sum of its proper divisors (32750007).

78820041 is a wasteful number, since it uses less digits than its factorization.

78820041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 78820041 is about 8878.0651608332. The cubic root of 78820041 is about 428.7579826080.

The spelling of 78820041 in words is "seventy-eight million, eight hundred twenty thousand, forty-one".