2784090 has 64 divisors (see below), whose sum is σ = 7278336. Its totient is φ = 678912.

The previous prime is 2784083. The next prime is 2784091. The reversal of 2784090 is 904872.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2784091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26979 + ... + 27081.

It is an arithmetic number, because the mean of its divisors is an integer number (113724).

2^2784090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2784090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3639168).

2784090 is an abundant number, since it is smaller than the sum of its proper divisors (4494246).

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

2784090 is a wasteful number, since it uses less digits than its factorization.

2784090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2784090 is about 1668.5592587619. The cubic root of 2784090 is about 140.6785090195.

The spelling of 2784090 in words is "two million, seven hundred eighty-four thousand, ninety".