978779560 has 64 divisors (see below), whose sum is σ = 2405894400. Its totient is φ = 355411200.

The previous prime is 978779521. The next prime is 978779563. The reversal of 978779560 is 65977879.

It is a junction number, because it is equal to n+sod(n) for n = 978779495 and 978779504.

It is not an unprimeable number, because it can be changed into a prime (978779563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456090 + ... + 458230.

It is an arithmetic number, because the mean of its divisors is an integer number (37592100).

Almost surely, 2^978779560 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 978779560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202947200).

978779560 is an abundant number, since it is smaller than the sum of its proper divisors (1427114840).

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

978779560 is a wasteful number, since it uses less digits than its factorization.

978779560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202 (or 3198 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 58.

The square root of 978779560 is about 31285.4528495274. The cubic root of 978779560 is about 992.8758875450.

The spelling of 978779560 in words is "nine hundred seventy-eight million, seven hundred seventy-nine thousand, five hundred sixty".