2728748077 has 18 divisors (see below), whose sum is σ = 3026457294. Its totient is φ = 2458375920.

The previous prime is 2728748027. The next prime is 2728748107. The reversal of 2728748077 is 7708478272.

It can be written as a sum of positive squares in only one way, i.e., 2103047881 + 625700196 = 45859^2 + 25014^2 .

It is not a de Polignac number, because 2728748077 - 2²³ = 2720359469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728748017) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7199674 + ... + 7200052.

Almost surely, 2^2728748077 is an apocalyptic number.

It is an amenable number.

2728748077 is a deficient number, since it is larger than the sum of its proper divisors (297709217).

2728748077 is an equidigital number, since it uses as much as digits as its factorization.

2728748077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 2458624, while the sum is 52.

The square root of 2728748077 is about 52237.4202751246. The cubic root of 2728748077 is about 1397.4013148398.

The spelling of 2728748077 in words is "two billion, seven hundred twenty-eight million, seven hundred forty-eight thousand, seventy-seven".