978988 has 6 divisors (see below), whose sum is σ = 1713236. Its totient is φ = 489492.

The previous prime is 978973. The next prime is 978997. The reversal of 978988 is 889879.

978988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

978988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122370 + ... + 122377.

2⁹⁷⁸⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

978988 is a deficient number, since it is larger than the sum of its proper divisors (734248).

978988 is a wasteful number, since it uses less digits than its factorization.

978988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244751 (or 244749 counting only the distinct ones).

The product of its digits is 290304, while the sum is 49.

The square root of 978988 is about 989.4382244486. The cubic root of 978988 is about 99.2946363189.

The spelling of 978988 in words is "nine hundred seventy-eight thousand, nine hundred eighty-eight".