2721294728 has 16 divisors (see below), whose sum is σ = 5104890000. Its totient is φ = 1359990736.

The previous prime is 2721294691. The next prime is 2721294733. The reversal of 2721294728 is 8274921272.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64238 + ... + 97821.

It is an arithmetic number, because the mean of its divisors is an integer number (319055625).

Almost surely, 2^2721294728 is an apocalyptic number.

It is an amenable number.

2721294728 is a deficient number, since it is larger than the sum of its proper divisors (2383595272).

2721294728 is a wasteful number, since it uses less digits than its factorization.

2721294728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164164 (or 164160 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 2721294728 is about 52166.0304029356. The cubic root of 2721294728 is about 1396.1278594340.

The spelling of 2721294728 in words is "two billion, seven hundred twenty-one million, two hundred ninety-four thousand, seven hundred twenty-eight".