85378 has 4 divisors (see below), whose sum is σ = 128070. Its totient is φ = 42688.

The previous prime is 85369. The next prime is 85381. The reversal of 85378 is 87358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 76729 + 8649 = 277^2 + 93^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

85378 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21343 + ... + 21346.

2⁸⁵³⁷⁸ is an apocalyptic number.

85378 is a deficient number, since it is larger than the sum of its proper divisors (42692).

85378 is a wasteful number, since it uses less digits than its factorization.

85378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42691.

The product of its digits is 6720, while the sum is 31.

The square root of 85378 is about 292.1951402744. The cubic root of 85378 is about 44.0333768789.

The spelling of 85378 in words is "eighty-five thousand, three hundred seventy-eight".