78865375 has 16 divisors (see below), whose sum is σ = 100047168. Its totient is φ = 62052000.

The previous prime is 78865351. The next prime is 78865379. The reversal of 78865375 is 57356887.

It is not a de Polignac number, because 78865375 - 2⁵ = 78865343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78865379) 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, 2454 + ... + 12796.

It is an arithmetic number, because the mean of its divisors is an integer number (6252948).

Almost surely, 2^78865375 is an apocalyptic number.

78865375 is a deficient number, since it is larger than the sum of its proper divisors (21181793).

78865375 is a wasteful number, since it uses less digits than its factorization.

78865375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10419 (or 10409 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 49.

The square root of 78865375 is about 8880.6179402111. The cubic root of 78865375 is about 428.8401680895.

The spelling of 78865375 in words is "seventy-eight million, eight hundred sixty-five thousand, three hundred seventy-five".