978378 has 8 divisors (see below), whose sum is σ = 1956768. Its totient is φ = 326124.

The previous prime is 978359. The next prime is 978389. The reversal of 978378 is 873879.

It is a sphenic number, since it is the product of 3 distinct primes.

978378 is an admirable number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81526 + ... + 81537.

It is an arithmetic number, because the mean of its divisors is an integer number (244596).

2⁹⁷⁸³⁷⁸ is an apocalyptic number.

978378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

978378 is a wasteful number, since it uses less digits than its factorization.

978378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163068.

The product of its digits is 84672, while the sum is 42.

The square root of 978378 is about 989.1299206879. The cubic root of 978378 is about 99.2740087891.

It can be divided in two parts, 9 and 78378, that added together give a palindrome (78387).

The spelling of 978378 in words is "nine hundred seventy-eight thousand, three hundred seventy-eight".