86378 has 4 divisors (see below), whose sum is σ = 129570. Its totient is φ = 43188.

The previous prime is 86371. The next prime is 86381. The reversal of 86378 is 87368.

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., 85849 + 529 = 293^2 + 23^2 .

It is a super-2 number, since 2×86378² = 14922317768, which contains 22 as substring.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 86378.

It is not an unprimeable number, because it can be changed into a prime (86371) by changing a digit.

86378 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21593 + ... + 21596.

2⁸⁶³⁷⁸ is an apocalyptic number.

86378 is a deficient number, since it is larger than the sum of its proper divisors (43192).

86378 is a wasteful number, since it uses less digits than its factorization.

86378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43191.

The product of its digits is 8064, while the sum is 32.

The square root of 86378 is about 293.9013439915. The cubic root of 86378 is about 44.2046254109.

Subtracting 86378 from its reverse (87368), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 8637 and 8, that multiplied together give a palindrome (69096).

The spelling of 86378 in words is "eighty-six thousand, three hundred seventy-eight".