978388 has 6 divisors (see below), whose sum is σ = 1712186. Its totient is φ = 489192.

The previous prime is 978359. The next prime is 978389. The reversal of 978388 is 883879.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 956484 + 21904 = 978^2 + 148^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978389) by changing a digit.

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 as a sum of consecutive naturals, namely, 122295 + ... + 122302.

2⁹⁷⁸³⁸⁸ is an apocalyptic number.

It is an amenable number.

978388 is a deficient number, since it is larger than the sum of its proper divisors (733798).

978388 is a wasteful number, since it uses less digits than its factorization.

978388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244601 (or 244599 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 978388 is about 989.1349756226. The cubic root of 978388 is about 99.2743470144.

The spelling of 978388 in words is "nine hundred seventy-eight thousand, three hundred eighty-eight".