2728730864 has 20 divisors (see below), whose sum is σ = 5386670856. Its totient is φ = 1338622272.

The previous prime is 2728730861. The next prime is 2728730869. The reversal of 2728730864 is 4680378272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728730861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608074 + ... + 1609769.

Almost surely, 2^2728730864 is an apocalyptic number.

It is an amenable number.

2728730864 is a deficient number, since it is larger than the sum of its proper divisors (2657939992).

2728730864 is a wasteful number, since it uses less digits than its factorization.

2728730864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217904 (or 3217898 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 47.

The square root of 2728730864 is about 52237.2555174944. The cubic root of 2728730864 is about 1397.3983765547.

The spelling of 2728730864 in words is "two billion, seven hundred twenty-eight million, seven hundred thirty thousand, eight hundred sixty-four".