2721981724 has 96 divisors (see below), whose sum is σ = 6619415040. Its totient is φ = 945561600.

The previous prime is 2721981653. The next prime is 2721981727. The reversal of 2721981724 is 4271891272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721981727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85804 + ... + 113164.

It is an arithmetic number, because the mean of its divisors is an integer number (68952240).

Almost surely, 2^2721981724 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 2721981724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3309707520).

2721981724 is an abundant number, since it is smaller than the sum of its proper divisors (3897433316).

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

2721981724 is a wasteful number, since it uses less digits than its factorization.

2721981724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27419 (or 27417 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 2721981724 is about 52172.6146939177. The cubic root of 2721981724 is about 1396.2453345884.

The spelling of 2721981724 in words is "two billion, seven hundred twenty-one million, nine hundred eighty-one thousand, seven hundred twenty-four".