2720538728 has 16 divisors (see below), whose sum is σ = 5102955780. Its totient is φ = 1359750528.

The previous prime is 2720538683. The next prime is 2720538767. The reversal of 2720538728 is 8278350272.

It can be written as a sum of positive squares in 2 ways, for example, as 2660290084 + 60248644 = 51578^2 + 7762^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42101 + ... + 84932.

Almost surely, 2^2720538728 is an apocalyptic number.

It is an amenable number.

2720538728 is a deficient number, since it is larger than the sum of its proper divisors (2382417052).

2720538728 is a wasteful number, since it uses less digits than its factorization.

2720538728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129716 (or 129712 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 44.

The square root of 2720538728 is about 52158.7838048396. The cubic root of 2720538728 is about 1395.9985618604.

The spelling of 2720538728 in words is "two billion, seven hundred twenty million, five hundred thirty-eight thousand, seven hundred twenty-eight".