2721220280 has 32 divisors (see below), whose sum is σ = 6444997200. Its totient is φ = 1031198976.

The previous prime is 2721220279. The next prime is 2721220303. The reversal of 2721220280 is 820221272.

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 7 ways as a sum of consecutive naturals, for example, 1789517 + ... + 1791036.

Almost surely, 2^2721220280 is an apocalyptic number.

2721220280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2721220280 is an abundant number, since it is smaller than the sum of its proper divisors (3723776920).

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

2721220280 is a wasteful number, since it uses less digits than its factorization.

2721220280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580583 (or 3580579 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 2721220280 is about 52165.3168302465. The cubic root of 2721220280 is about 1396.1151277646.

The spelling of 2721220280 in words is "two billion, seven hundred twenty-one million, two hundred twenty thousand, two hundred eighty".