78765849 has 12 divisors (see below), whose sum is σ = 119761200. Its totient is φ = 49746744.

The previous prime is 78765847. The next prime is 78765853. The reversal of 78765849 is 94856787.

It is not a de Polignac number, because 78765849 - 2¹ = 78765847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78765795 and 78765804.

It is not an unprimeable number, because it can be changed into a prime (78765847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230139 + ... + 230480.

It is an arithmetic number, because the mean of its divisors is an integer number (9980100).

Almost surely, 2^78765849 is an apocalyptic number.

It is an amenable number.

78765849 is a deficient number, since it is larger than the sum of its proper divisors (40995351).

78765849 is a wasteful number, since it uses less digits than its factorization.

78765849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460644 (or 460641 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 78765849 is about 8875.0126197093. The cubic root of 78765849 is about 428.6596971999.

The spelling of 78765849 in words is "seventy-eight million, seven hundred sixty-five thousand, eight hundred forty-nine".