1115455840 has 96 divisors (see below), whose sum is σ = 2817291456. Its totient is φ = 416317440.

The previous prime is 1115455813. The next prime is 1115455843. The reversal of 1115455840 is 485545111.

It is a junction number, because it is equal to n+sod(n) for n = 1115455796 and 1115455805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115455843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147184 + ... + 154576.

It is an arithmetic number, because the mean of its divisors is an integer number (29346786).

Almost surely, 2^1115455840 is an apocalyptic number.

1115455840 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 1115455840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408645728).

1115455840 is an abundant number, since it is smaller than the sum of its proper divisors (1701835616).

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

1115455840 is a wasteful number, since it uses less digits than its factorization.

1115455840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7472 (or 7464 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 1115455840 is about 33398.4406821636. The cubic root of 1115455840 is about 1037.0924211212.

The spelling of 1115455840 in words is "one billion, one hundred fifteen million, four hundred fifty-five thousand, eight hundred forty".