2708920221 has 8 divisors (see below), whose sum is σ = 4127878464. Its totient is φ = 1547954400.

The previous prime is 2708920171. The next prime is 2708920237. The reversal of 2708920221 is 1220298072.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2708920221 - 2¹⁰ = 2708919197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2708920271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64498080 + ... + 64498121.

It is an arithmetic number, because the mean of its divisors is an integer number (515984808).

Almost surely, 2^2708920221 is an apocalyptic number.

2708920221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2708920221 is a deficient number, since it is larger than the sum of its proper divisors (1418958243).

2708920221 is a wasteful number, since it uses less digits than its factorization.

2708920221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128996211.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 2708920221 is about 52047.2883155309. The cubic root of 2708920221 is about 1394.0084458264.

The spelling of 2708920221 in words is "two billion, seven hundred eight million, nine hundred twenty thousand, two hundred twenty-one".