11128915940 has 12 divisors (see below), whose sum is σ = 23370723516. Its totient is φ = 4451566368.

The previous prime is 11128915933. The next prime is 11128915949. The reversal of 11128915940 is 4951982111.

It can be written as a sum of positive squares in 2 ways, for example, as 4624816036 + 6504099904 = 68006^2 + 80648^2 .

It is not an unprimeable number, because it can be changed into a prime (11128915949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278222879 + ... + 278222918.

It is an arithmetic number, because the mean of its divisors is an integer number (1947560293).

Almost surely, 2^11128915940 is an apocalyptic number.

11128915940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11128915940 is an abundant number, since it is smaller than the sum of its proper divisors (12241807576).

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

11128915940 is a wasteful number, since it uses less digits than its factorization.

11128915940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556445806 (or 556445804 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 41.

The spelling of 11128915940 in words is "eleven billion, one hundred twenty-eight million, nine hundred fifteen thousand, nine hundred forty".