2721289356 has 72 divisors (see below), whose sum is σ = 7134145200. Its totient is φ = 873586560.

The previous prime is 2721289343. The next prime is 2721289369. The reversal of 2721289356 is 6539821272.

2721289356 is a `hidden beast` number, since 2 + 7 + 212 + 89 + 356 = 666.

It is an interprime number because it is at equal distance from previous prime (2721289343) and next prime (2721289369).

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, 434326 + ... + 440546.

It is an arithmetic number, because the mean of its divisors is an integer number (99085350).

Almost surely, 2^2721289356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2721289356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3567072600).

2721289356 is an abundant number, since it is smaller than the sum of its proper divisors (4412855844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2721289356 is a wasteful number, since it uses less digits than its factorization.

2721289356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6679 (or 6674 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 2721289356 is about 52165.9789134643. The cubic root of 2721289356 is about 1396.1269407532.

The spelling of 2721289356 in words is "two billion, seven hundred twenty-one million, two hundred eighty-nine thousand, three hundred fifty-six".