11280395844 has 36 divisors (see below), whose sum is σ = 28519116444. Its totient is φ = 3759501312.

The previous prime is 11280395773. The next prime is 11280395923. The reversal of 11280395844 is 44859308211.

11280395844 is a `hidden beast` number, since 11 + 28 + 0 + 39 + 584 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1417522500 + 9862873344 = 37650^2 + 99312^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11280395844.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224004 + ... + 269700.

It is an arithmetic number, because the mean of its divisors is an integer number (792197679).

Almost surely, 2^11280395844 is an apocalyptic number.

It is an amenable number.

11280395844 is an abundant number, since it is smaller than the sum of its proper divisors (17238720600).

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

11280395844 is a wasteful number, since it uses less digits than its factorization.

11280395844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52564 (or 52559 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 11280395844 in words is "eleven billion, two hundred eighty million, three hundred ninety-five thousand, eight hundred forty-four".