78757385 has 16 divisors (see below), whose sum is σ = 108642816. Its totient is φ = 53688768.

The previous prime is 78757363. The next prime is 78757387. The reversal of 78757385 is 58375787.

It is not a de Polignac number, because 78757385 - 2⁶ = 78757321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78757387) 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, 449 + ... + 12558.

It is an arithmetic number, because the mean of its divisors is an integer number (6790176).

Almost surely, 2^78757385 is an apocalyptic number.

It is an amenable number.

78757385 is a deficient number, since it is larger than the sum of its proper divisors (29885431).

78757385 is a wasteful number, since it uses less digits than its factorization.

78757385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13192.

The product of its digits is 1646400, while the sum is 50.

The square root of 78757385 is about 8874.5357625061. The cubic root of 78757385 is about 428.6443423827.

The spelling of 78757385 in words is "seventy-eight million, seven hundred fifty-seven thousand, three hundred eighty-five".