1084840 has 32 divisors (see below), whose sum is σ = 2510280. Its totient is φ = 421632.

The previous prime is 1084829. The next prime is 1084859. The reversal of 1084840 is 484801.

It can be written as a sum of positive squares in 4 ways, for example, as 1077444 + 7396 = 1038^2 + 86^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114 + ... + 1846.

2^1084840 is an apocalyptic number.

1084840 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 1084840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1255140).

1084840 is an abundant number, since it is smaller than the sum of its proper divisors (1425440).

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

1084840 is a wasteful number, since it uses less digits than its factorization.

1084840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 1084840 is about 1041.5565275106. The cubic root of 1084840 is about 102.7515929290.

The spelling of 1084840 in words is "one million, eighty-four thousand, eight hundred forty".