978486656 has 32 divisors (see below), whose sum is σ = 2227806480. Its totient is φ = 419351040.

The previous prime is 978486611. The next prime is 978486659. The reversal of 978486656 is 656684879.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×978486656² = 1914872271940124672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 978486595 and 978486604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978486659) 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 3 ways as a sum of consecutive naturals, for example, 545135 + ... + 546926.

Almost surely, 2^978486656 is an apocalyptic number.

It is an amenable number.

978486656 is an abundant number, since it is smaller than the sum of its proper divisors (1249319824).

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

978486656 is a wasteful number, since it uses less digits than its factorization.

978486656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092082 (or 1092070 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 59.

The square root of 978486656 is about 31280.7713459883. The cubic root of 978486656 is about 992.7768368684.

The spelling of 978486656 in words is "nine hundred seventy-eight million, four hundred eighty-six thousand, six hundred fifty-six".