1115805438 has 192 divisors, whose sum is σ = 2992204800. Its totient is φ = 296110080.

The previous prime is 1115805389. The next prime is 1115805443. The reversal of 1115805438 is 8345085111.

1115805438 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4668523 + ... + 4668761.

It is an arithmetic number, because the mean of its divisors is an integer number (15584400).

Almost surely, 2^1115805438 is an apocalyptic number.

1115805438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115805438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496102400).

1115805438 is an abundant number, since it is smaller than the sum of its proper divisors (1876399362).

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

1115805438 is a wasteful number, since it uses less digits than its factorization.

1115805438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 1115805438 is about 33403.6740194847. The cubic root of 1115805438 is about 1037.2007557746.

The spelling of 1115805438 in words is "one billion, one hundred fifteen million, eight hundred five thousand, four hundred thirty-eight".