978765456 has 20 divisors (see below), whose sum is σ = 2528477552. Its totient is φ = 326255136.

The previous prime is 978765443. The next prime is 978765461. The reversal of 978765456 is 654567879.

It is a junction number, because it is equal to n+sod(n) for n = 978765396 and 978765405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10195426 + ... + 10195521.

Almost surely, 2^978765456 is an apocalyptic number.

It is an amenable number.

978765456 is an abundant number, since it is smaller than the sum of its proper divisors (1549712096).

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

978765456 is a wasteful number, since it uses less digits than its factorization.

978765456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20390958 (or 20390952 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The square root of 978765456 is about 31285.2274404390. The cubic root of 978765456 is about 992.8711184805.

The spelling of 978765456 in words is "nine hundred seventy-eight million, seven hundred sixty-five thousand, four hundred fifty-six".