2728417 has 6 divisors (see below), whose sum is σ = 2805558. Its totient is φ = 2653344.

The previous prime is 2728409. The next prime is 2728447. The reversal of 2728417 is 7148272.

It can be written as a sum of positive squares in 3 ways, for example, as 1852321 + 876096 = 1361^2 + 936^2 .

It is not a de Polignac number, because 2728417 - 2³ = 2728409 is a prime.

It is a Duffinian number.

2728417 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2728447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 373 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (467593).

2^2728417 is an apocalyptic number.

It is an amenable number.

2728417 is a deficient number, since it is larger than the sum of its proper divisors (77141).

2728417 is an equidigital number, since it uses as much as digits as its factorization.

2728417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067 (or 2030 counting only the distinct ones).

The product of its digits is 6272, while the sum is 31.

The square root of 2728417 is about 1651.7920571307. The cubic root of 2728417 is about 139.7344797329.

The spelling of 2728417 in words is "two million, seven hundred twenty-eight thousand, four hundred seventeen".