82378 has 4 divisors (see below), whose sum is σ = 123570. Its totient is φ = 41188.

The previous prime is 82373. The next prime is 82387. The reversal of 82378 is 87328.

It is a happy number.

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., 82369 + 9 = 287^2 + 3^2 .

It is a super-2 number, since 2×82378² = 13572269768, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8 + 2¹⁵ + 3³ + 7⁵ + 8⁵ .

It is not an unprimeable number, because it can be changed into a prime (82373) by changing a digit.

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, 20593 + ... + 20596.

2⁸²³⁷⁸ is an apocalyptic number.

82378 is a deficient number, since it is larger than the sum of its proper divisors (41192).

82378 is a wasteful number, since it uses less digits than its factorization.

82378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41191.

The product of its digits is 2688, while the sum is 28.

The square root of 82378 is about 287.0156790142. The cubic root of 82378 is about 43.5114692090.

Subtracting 82378 from its reverse (87328), we obtain a triangular number (4950 = T₉₉).

The spelling of 82378 in words is "eighty-two thousand, three hundred seventy-eight".