1083840 has 56 divisors (see below), whose sum is σ = 3444240. Its totient is φ = 288768.

The previous prime is 1083839. The next prime is 1083847. The reversal of 1083840 is 483801.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1083840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1083847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 1524.

2^1083840 is an apocalyptic number.

1083840 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 1083840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722120).

1083840 is an abundant number, since it is smaller than the sum of its proper divisors (2360400).

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

1083840 is a wasteful number, since it uses less digits than its factorization.

1083840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1083840 is about 1041.0763660750. The cubic root of 1083840 is about 102.7200112577.

It can be divided in two parts, 10838 and 40, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 1083840 in words is "one million, eighty-three thousand, eight hundred forty".