2728447 has 2 divisors, whose sum is σ = 2728448. Its totient is φ = 2728446.

The previous prime is 2728409. The next prime is 2728471. The reversal of 2728447 is 7448272.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2728447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2728247) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364223 + 1364224.

It is an arithmetic number, because the mean of its divisors is an integer number (1364224).

2^2728447 is an apocalyptic number.

2728447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728447 is an equidigital number, since it uses as much as digits as its factorization.

2728447 is an evil number, because the sum of its binary digits is even.

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

The square root of 2728447 is about 1651.8011381519. The cubic root of 2728447 is about 139.7349918759.

The spelling of 2728447 in words is "two million, seven hundred twenty-eight thousand, four hundred forty-seven".