978140 has 12 divisors (see below), whose sum is σ = 2054136. Its totient is φ = 391248.

The previous prime is 978113. The next prime is 978149. The reversal of 978140 is 41879.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978140.

It is not an unprimeable number, because it can be changed into a prime (978149) by changing a digit.

978140 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24434 + ... + 24473.

It is an arithmetic number, because the mean of its divisors is an integer number (171178).

2⁹⁷⁸¹⁴⁰ is an apocalyptic number.

It is an amenable number.

978140 is an abundant number, since it is smaller than the sum of its proper divisors (1075996).

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

978140 is a wasteful number, since it uses less digits than its factorization.

978140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48916 (or 48914 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 978140 is about 989.0096056156. The cubic root of 978140 is about 99.2659583456.

The spelling of 978140 in words is "nine hundred seventy-eight thousand, one hundred forty".