2728135477 has 2 divisors, whose sum is σ = 2728135478. Its totient is φ = 2728135476.

The previous prime is 2728135471. The next prime is 2728135489. The reversal of 2728135477 is 7745318272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1499703076 + 1228432401 = 38726^2 + 35049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2728135477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2728135471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364067738 + 1364067739.

It is an arithmetic number, because the mean of its divisors is an integer number (1364067739).

Almost surely, 2^2728135477 is an apocalyptic number.

It is an amenable number.

2728135477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728135477 is an equidigital number, since it uses as much as digits as its factorization.

2728135477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 658560, while the sum is 46.

The square root of 2728135477 is about 52231.5563333125. The cubic root of 2728135477 is about 1397.2967354882.

The spelling of 2728135477 in words is "two billion, seven hundred twenty-eight million, one hundred thirty-five thousand, four hundred seventy-seven".