2051784 has 128 divisors (see below), whose sum is σ = 6912000. Its totient is φ = 551232.

The previous prime is 2051773. The next prime is 2051801. The reversal of 2051784 is 4871502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34747 + ... + 34805.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2^2051784 is an apocalyptic number.

2051784 is a gapful number since it is divisible by the number (24) 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 2051784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3456000).

2051784 is an abundant number, since it is smaller than the sum of its proper divisors (4860216).

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

2051784 is a wasteful number, since it uses less digits than its factorization.

2051784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2051784 is about 1432.4049706700. The cubic root of 2051784 is about 127.0702486095.

The spelling of 2051784 in words is "two million, fifty-one thousand, seven hundred eighty-four".