2049840 has 160 divisors (see below), whose sum is σ = 7707840. Its totient is φ = 497664.

The previous prime is 2049823. The next prime is 2049847. The reversal of 2049840 is 489402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2049847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28044 + ... + 28116.

It is an arithmetic number, because the mean of its divisors is an integer number (48174).

2^2049840 is an apocalyptic number.

2049840 is a gapful number since it is divisible by the number (20) 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 2049840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3853920).

2049840 is an abundant number, since it is smaller than the sum of its proper divisors (5658000).

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

2049840 is a wasteful number, since it uses less digits than its factorization.

2049840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2049840 is about 1431.7262308137. The cubic root of 2049840 is about 127.0301042570.

The spelling of 2049840 in words is "two million, forty-nine thousand, eight hundred forty".