978312 has 16 divisors (see below), whose sum is σ = 2445840. Its totient is φ = 326096.

The previous prime is 978287. The next prime is 978323. The reversal of 978312 is 213879.

It is a happy number.

It is an Ulam number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 978312.

It is an unprimeable number.

978312 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20358 + ... + 20405.

It is an arithmetic number, because the mean of its divisors is an integer number (152865).

2⁹⁷⁸³¹² is an apocalyptic number.

It is an amenable number.

978312 is an abundant number, since it is smaller than the sum of its proper divisors (1467528).

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

978312 is a wasteful number, since it uses less digits than its factorization.

978312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40772 (or 40768 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 978312 is about 989.0965574705. The cubic root of 978312 is about 99.2717764440.

The spelling of 978312 in words is "nine hundred seventy-eight thousand, three hundred twelve".