78075387 has 16 divisors (see below), whose sum is σ = 124565280. Its totient is φ = 48046176.

The previous prime is 78075379. The next prime is 78075449. The reversal of 78075387 is 78357087.

It is not a de Polignac number, because 78075387 - 2³ = 78075379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78075377) 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 15 ways as a sum of consecutive naturals, for example, 110868 + ... + 111569.

It is an arithmetic number, because the mean of its divisors is an integer number (7785330).

Almost surely, 2^78075387 is an apocalyptic number.

78075387 is a deficient number, since it is larger than the sum of its proper divisors (46489893).

78075387 is a wasteful number, since it uses less digits than its factorization.

78075387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222459 (or 222453 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 78075387 is about 8836.0277840215. The cubic root of 78075387 is about 427.4034746676.

It can be divided in two parts, 780 and 75387, that added together give a palindrome (76167).

The spelling of 78075387 in words is "seventy-eight million, seventy-five thousand, three hundred eighty-seven".