2721890605 has 16 divisors (see below), whose sum is σ = 3737885184. Its totient is φ = 1863936000.

The previous prime is 2721890603. The next prime is 2721890609. The reversal of 2721890605 is 5060981272.

It is not a de Polignac number, because 2721890605 - 2¹ = 2721890603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721890603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25492 + ... + 78061.

It is an arithmetic number, because the mean of its divisors is an integer number (233617824).

Almost surely, 2^2721890605 is an apocalyptic number.

It is an amenable number.

2721890605 is a deficient number, since it is larger than the sum of its proper divisors (1015994579).

2721890605 is a wasteful number, since it uses less digits than its factorization.

2721890605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104316.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 2721890605 is about 52171.7414411288. The cubic root of 2721890605 is about 1396.2297545305.

The spelling of 2721890605 in words is "two billion, seven hundred twenty-one million, eight hundred ninety thousand, six hundred five".