978320 has 40 divisors (see below), whose sum is σ = 2601024. Its totient is φ = 335232.

The previous prime is 978287. The next prime is 978323. The reversal of 978320 is 23879.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×978320² = 1914220044800, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (978323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314 + ... + 1433.

2⁹⁷⁸³²⁰ is an apocalyptic number.

It is an amenable number.

978320 is an abundant number, since it is smaller than the sum of its proper divisors (1622704).

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

978320 is a wasteful number, since it uses less digits than its factorization.

978320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 978320 is about 989.1006015568. The cubic root of 978320 is about 99.2720470366.

The spelling of 978320 in words is "nine hundred seventy-eight thousand, three hundred twenty".