9778448780 has 24 divisors (see below), whose sum is σ = 20882791440. Its totient is φ = 3845084480.

The previous prime is 9778448767. The next prime is 9778448831. The reversal of 9778448780 is 878448779.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4142231 + ... + 4144590.

It is an arithmetic number, because the mean of its divisors is an integer number (870116310).

Almost surely, 2^9778448780 is an apocalyptic number.

It is an amenable number.

9778448780 is an abundant number, since it is smaller than the sum of its proper divisors (11104342660).

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

9778448780 is a wasteful number, since it uses less digits than its factorization.

9778448780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8286889 (or 8286887 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 62.

The square root of 9778448780 is about 98886.0393584453. The cubic root of 9778448780 is about 2138.4051339389.

The spelling of 9778448780 in words is "nine billion, seven hundred seventy-eight million, four hundred forty-eight thousand, seven hundred eighty".