1113840405 has 12 divisors (see below), whose sum is σ = 1930656780. Its totient is φ = 594048192.

The previous prime is 1113840397. The next prime is 1113840407. The reversal of 1113840405 is 5040483111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 328551876 + 785288529 = 18126^2 + 28023^2 .

It is not a de Polignac number, because 1113840405 - 2³ = 1113840397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113840407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12375960 + ... + 12376049.

It is an arithmetic number, because the mean of its divisors is an integer number (160888065).

Almost surely, 2^1113840405 is an apocalyptic number.

1113840405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1113840405 is a deficient number, since it is larger than the sum of its proper divisors (816816375).

1113840405 is a wasteful number, since it uses less digits than its factorization.

1113840405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24752020 (or 24752017 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1113840405 is about 33374.2476319692. The cubic root of 1113840405 is about 1036.5915302888.

The spelling of 1113840405 in words is "one billion, one hundred thirteen million, eight hundred forty thousand, four hundred five".