2784428 has 6 divisors (see below), whose sum is σ = 4872756. Its totient is φ = 1392212.

The previous prime is 2784373. The next prime is 2784473. The reversal of 2784428 is 8244872.

It is a super-3 number, since 3×2784428³ = 64763339029005512256, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348050 + ... + 348057.

It is an arithmetic number, because the mean of its divisors is an integer number (812126).

2^2784428 is an apocalyptic number.

It is an amenable number.

2784428 is a deficient number, since it is larger than the sum of its proper divisors (2088328).

2784428 is a wasteful number, since it uses less digits than its factorization.

2784428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696111 (or 696109 counting only the distinct ones).

The product of its digits is 28672, while the sum is 35.

The square root of 2784428 is about 1668.6605406733. The cubic root of 2784428 is about 140.6842017727.

It can be divided in two parts, 27844 and 28, that added together give a palindrome (27872).

The spelling of 2784428 in words is "two million, seven hundred eighty-four thousand, four hundred twenty-eight".