1111165440 has 320 divisors, whose sum is σ = 4431144960. Its totient is φ = 230768640.

The previous prime is 1111165439. The next prime is 1111165469. The reversal of 1111165440 is 445611111.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1111165440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 590421 + ... + 592299.

It is an arithmetic number, because the mean of its divisors is an integer number (13847328).

Almost surely, 2^1111165440 is an apocalyptic number.

1111165440 is a gapful number since it is divisible by the number (10) 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 1111165440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2215572480).

1111165440 is an abundant number, since it is smaller than the sum of its proper divisors (3319979520).

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

1111165440 is a wasteful number, since it uses less digits than its factorization.

1111165440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 1111165440 is about 33334.1482567052. The cubic root of 1111165440 is about 1035.7610496251.

Adding to 1111165440 its reverse (445611111), we get a palindrome (1556776551).

The spelling of 1111165440 in words is "one billion, one hundred eleven million, one hundred sixty-five thousand, four hundred forty".