78487755 has 16 divisors (see below), whose sum is σ = 126222624. Its totient is φ = 41646080.

The previous prime is 78487699. The next prime is 78487757. The reversal of 78487755 is 55778487.

It is not a de Polignac number, because 78487755 - 2²⁰ = 77439179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78487698 and 78487707.

It is not an unprimeable number, because it can be changed into a prime (78487757) 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, 10326 + ... + 16235.

It is an arithmetic number, because the mean of its divisors is an integer number (7888914).

Almost surely, 2^78487755 is an apocalyptic number.

78487755 is a deficient number, since it is larger than the sum of its proper divisors (47734869).

78487755 is a wasteful number, since it uses less digits than its factorization.

78487755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26766.

The product of its digits is 2195200, while the sum is 51.

The square root of 78487755 is about 8859.3315210573. The cubic root of 78487755 is about 428.1546210347.

The spelling of 78487755 in words is "seventy-eight million, four hundred eighty-seven thousand, seven hundred fifty-five".