9287780256 has 144 divisors (see below), whose sum is σ = 27343540224. Its totient is φ = 2988099072.

The previous prime is 9287780251. The next prime is 9287780263. The reversal of 9287780256 is 6520877829.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (9287780251) 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 23 ways as a sum of consecutive naturals, for example, 1349881 + ... + 1356743.

It is an arithmetic number, because the mean of its divisors is an integer number (189885696).

Almost surely, 2^9287780256 is an apocalyptic number.

9287780256 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9287780256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13671770112).

9287780256 is an abundant number, since it is smaller than the sum of its proper divisors (18055759968).

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

9287780256 is a wasteful number, since it uses less digits than its factorization.

9287780256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043 (or 7032 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The square root of 9287780256 is about 96373.1303631879. The cubic root of 9287780256 is about 2102.0222587821.

The spelling of 9287780256 in words is "nine billion, two hundred eighty-seven million, seven hundred eighty thousand, two hundred fifty-six".