9278228643840 has 3360 divisors, whose sum is σ = 41154964038720. Its totient is φ = 1981355655168.

The previous prime is 9278228643793. The next prime is 9278228643851. The reversal of 9278228643840 is 483468228729.

9278228643840 is a `hidden beast` number, since 9 + 2 + 7 + 82 + 2 + 86 + 438 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 250762936302 + ... + 250762936338.

It is an arithmetic number, because the mean of its divisors is an integer number (12248501202).

Almost surely, 2^{9278228643840} is an apocalyptic number.

9278228643840 is a gapful number since it is divisible by the number (90) 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 9278228643840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20577482019360).

9278228643840 is an abundant number, since it is smaller than the sum of its proper divisors (31876735394880).

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

9278228643840 is a wasteful number, since it uses less digits than its factorization.

9278228643840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 63.

The spelling of 9278228643840 in words is "nine trillion, two hundred seventy-eight billion, two hundred twenty-eight million, six hundred forty-three thousand, eight hundred forty".