1113840 has 240 divisors, whose sum is σ = 4874688. Its totient is φ = 221184.

The previous prime is 1113809. The next prime is 1113859. The reversal of 1113840 is 483111.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65512 + ... + 65528.

2^1113840 is an apocalyptic number.

1113840 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 1113840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2437344).

1113840 is an abundant number, since it is smaller than the sum of its proper divisors (3760848).

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

1113840 is a wasteful number, since it uses less digits than its factorization.

1113840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1113840 is about 1055.3861852422. The cubic root of 1113840 is about 103.6591404652.

Adding to 1113840 its reverse (483111), we get a palindrome (1596951).

It can be divided in two parts, 1113 and 840, that added together give a triangular number (1953 = T₆₂).

The spelling of 1113840 in words is "one million, one hundred thirteen thousand, eight hundred forty".