2720408805 has 12 divisors (see below), whose sum is σ = 4715375340. Its totient is φ = 1450884672.

The previous prime is 2720408797. The next prime is 2720408837. The reversal of 2720408805 is 5088040272.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 309795201 + 2410613604 = 17601^2 + 49098^2 .

It is not a de Polignac number, because 2720408805 - 2³ = 2720408797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2720408805.

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 11 ways as a sum of consecutive naturals, for example, 30226720 + ... + 30226809.

It is an arithmetic number, because the mean of its divisors is an integer number (392947945).

Almost surely, 2^2720408805 is an apocalyptic number.

It is an amenable number.

2720408805 is a deficient number, since it is larger than the sum of its proper divisors (1994966535).

2720408805 is a wasteful number, since it uses less digits than its factorization.

2720408805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60453540 (or 60453537 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 2720408805 is about 52157.5383333991. The cubic root of 2720408805 is about 1395.9763389079.

The spelling of 2720408805 in words is "two billion, seven hundred twenty million, four hundred eight thousand, eight hundred five".