1111857940 has 12 divisors (see below), whose sum is σ = 2334901716. Its totient is φ = 444743168.

The previous prime is 1111857937. The next prime is 1111857947. The reversal of 1111857940 is 497581111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 885776644 + 226081296 = 29762^2 + 15036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1111857940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111857947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27796429 + ... + 27796468.

It is an arithmetic number, because the mean of its divisors is an integer number (194575143).

Almost surely, 2^1111857940 is an apocalyptic number.

1111857940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111857940 is an abundant number, since it is smaller than the sum of its proper divisors (1223043776).

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

1111857940 is a wasteful number, since it uses less digits than its factorization.

1111857940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55592906 (or 55592904 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 37.

The square root of 1111857940 is about 33344.5338848813. The cubic root of 1111857940 is about 1035.9761737786.

The spelling of 1111857940 in words is "one billion, one hundred eleven million, eight hundred fifty-seven thousand, nine hundred forty".