78286875 has 40 divisors (see below), whose sum is σ = 133607232. Its totient is φ = 40740000.

The previous prime is 78286849. The next prime is 78286891. The reversal of 78286875 is 57868287.

It is not a de Polignac number, because 78286875 - 2²³ = 69898267 is a prime.

It is a super-2 number, since 2×78286875² = 12257669594531250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 80140 + ... + 81110.

Almost surely, 2^78286875 is an apocalyptic number.

78286875 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78286875 is a deficient number, since it is larger than the sum of its proper divisors (55320357).

78286875 is an equidigital number, since it uses as much as digits as its factorization.

78286875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1022 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 78286875 is about 8847.9870592130. The cubic root of 78286875 is about 427.7890388270.

The spelling of 78286875 in words is "seventy-eight million, two hundred eighty-six thousand, eight hundred seventy-five".