978785 has 8 divisors (see below), whose sum is σ = 1236480. Its totient is φ = 741744.

The previous prime is 978773. The next prime is 978797. The reversal of 978785 is 587879.

It is an interprime number because it is at equal distance from previous prime (978773) and next prime (978797).

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

It is a cyclic number.

It is not a de Polignac number, because 978785 - 2¹⁰ = 977761 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978785.

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 7 ways as a sum of consecutive naturals, for example, 5057 + ... + 5246.

It is an arithmetic number, because the mean of its divisors is an integer number (154560).

2⁹⁷⁸⁷⁸⁵ is an apocalyptic number.

978785 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

978785 is a deficient number, since it is larger than the sum of its proper divisors (257695).

978785 is a wasteful number, since it uses less digits than its factorization.

978785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327.

The product of its digits is 141120, while the sum is 44.

The square root of 978785 is about 989.3356356667. The cubic root of 978785 is about 99.2877726990.

The spelling of 978785 in words is "nine hundred seventy-eight thousand, seven hundred eighty-five".