2784427 has 4 divisors (see below), whose sum is σ = 2790720. Its totient is φ = 2778136.

The previous prime is 2784373. The next prime is 2784473. The reversal of 2784427 is 7244872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2784427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2784392 and 2784401.

It is not an unprimeable number, because it can be changed into a prime (2784227) 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 3 ways as a sum of consecutive naturals, for example, 2428 + ... + 3385.

It is an arithmetic number, because the mean of its divisors is an integer number (697680).

2^2784427 is an apocalyptic number.

2784427 is a deficient number, since it is larger than the sum of its proper divisors (6293).

2784427 is an equidigital number, since it uses as much as digits as its factorization.

2784427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6292.

The product of its digits is 25088, while the sum is 34.

The square root of 2784427 is about 1668.6602410317. The cubic root of 2784427 is about 140.6841849309.

The spelling of 2784427 in words is "two million, seven hundred eighty-four thousand, four hundred twenty-seven".