2728669 has 2 divisors, whose sum is σ = 2728670. Its totient is φ = 2728668.

The previous prime is 2728657. The next prime is 2728703. The reversal of 2728669 is 9668272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1651225 + 1077444 = 1285^2 + 1038^2 .

It is a cyclic number.

It is not a de Polignac number, because 2728669 - 2⁷ = 2728541 is a prime.

It is a super-2 number, since 2×2728669² = 14891269023122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2728169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364334 + 1364335.

It is an arithmetic number, because the mean of its divisors is an integer number (1364335).

2^2728669 is an apocalyptic number.

It is an amenable number.

2728669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728669 is an equidigital number, since it uses as much as digits as its factorization.

2728669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 2728669 is about 1651.8683361576. The cubic root of 2728669 is about 139.7387816174.

The spelling of 2728669 in words is "two million, seven hundred twenty-eight thousand, six hundred sixty-nine".