2721729285 has 24 divisors (see below), whose sum is σ = 5146543584. Its totient is φ = 1319626080.

The previous prime is 2721729259. The next prime is 2721729313. The reversal of 2721729285 is 5829271272.

2721729285 is a `hidden beast` number, since 272 + 17 + 292 + 85 = 666.

It is not a de Polignac number, because 2721729285 - 2⁸ = 2721729029 is a prime.

It is a super-2 number, since 2×2721729285² = 14815620601653222450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2721729285.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 2748727 + ... + 2749716.

It is an arithmetic number, because the mean of its divisors is an integer number (214439316).

Almost surely, 2^2721729285 is an apocalyptic number.

It is an amenable number.

2721729285 is a deficient number, since it is larger than the sum of its proper divisors (2424814299).

2721729285 is a wasteful number, since it uses less digits than its factorization.

2721729285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5498465 (or 5498462 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 2721729285 is about 52170.1953705370. The cubic root of 2721729285 is about 1396.2021702436.

The spelling of 2721729285 in words is "two billion, seven hundred twenty-one million, seven hundred twenty-nine thousand, two hundred eighty-five".