9788391280 has 40 divisors (see below), whose sum is σ = 22865907024. Its totient is φ = 3896793600.

The previous prime is 9788391191. The next prime is 9788391289. The reversal of 9788391280 is 821938879.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9788391289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273061 + ... + 306820.

Almost surely, 2^9788391280 is an apocalyptic number.

It is an amenable number.

9788391280 is an abundant number, since it is smaller than the sum of its proper divisors (13077515744).

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

9788391280 is a wasteful number, since it uses less digits than its factorization.

9788391280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580105 (or 580099 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 9788391280 is about 98936.2991019979. The cubic root of 9788391280 is about 2139.1296486910.

The spelling of 9788391280 in words is "nine billion, seven hundred eighty-eight million, three hundred ninety-one thousand, two hundred eighty".