1111405040 has 80 divisors (see below), whose sum is σ = 2664204480. Its totient is φ = 430909440.

The previous prime is 1111404997. The next prime is 1111405079. The reversal of 1111405040 is 405041111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546746 + ... + 548774.

It is an arithmetic number, because the mean of its divisors is an integer number (33302556).

Almost surely, 2^1111405040 is an apocalyptic number.

1111405040 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 1111405040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332102240).

1111405040 is an abundant number, since it is smaller than the sum of its proper divisors (1552799440).

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

1111405040 is a wasteful number, since it uses less digits than its factorization.

1111405040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250 (or 2244 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1111405040 is about 33337.7419751248. The cubic root of 1111405040 is about 1035.8354911389.

Adding to 1111405040 its reverse (405041111), we get a palindrome (1516446151).

The spelling of 1111405040 in words is "one billion, one hundred eleven million, four hundred five thousand, forty".