978862456 has 64 divisors (see below), whose sum is σ = 2183731200. Its totient is φ = 405475200.

The previous prime is 978862453. The next prime is 978862471. The reversal of 978862456 is 654268879.

It is a junction number, because it is equal to n+sod(n) for n = 978862397 and 978862406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978862453) 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 in 15 ways as a sum of consecutive naturals, for example, 84961 + ... + 95791.

It is an arithmetic number, because the mean of its divisors is an integer number (34120800).

Almost surely, 2^978862456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 978862456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1091865600).

978862456 is an abundant number, since it is smaller than the sum of its proper divisors (1204868744).

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

978862456 is a wasteful number, since it uses less digits than its factorization.

978862456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10940 (or 10936 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The square root of 978862456 is about 31286.7776544661. Note that the first 3 decimals coincide. The cubic root of 978862456 is about 992.9039167083.

The spelling of 978862456 in words is "nine hundred seventy-eight million, eight hundred sixty-two thousand, four hundred fifty-six".