2721398862 has 128 divisors (see below), whose sum is σ = 7266889728. Its totient is φ = 658944000.

The previous prime is 2721398839. The next prime is 2721398887. The reversal of 2721398862 is 2688931272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 376987 + ... + 384137.

It is an arithmetic number, because the mean of its divisors is an integer number (56772576).

Almost surely, 2^2721398862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2721398862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3633444864).

2721398862 is an abundant number, since it is smaller than the sum of its proper divisors (4545490866).

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

2721398862 is a wasteful number, since it uses less digits than its factorization.

2721398862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7234.

The product of its digits is 580608, while the sum is 48.

The square root of 2721398862 is about 52167.0284950178. The cubic root of 2721398862 is about 1396.1456674432.

The spelling of 2721398862 in words is "two billion, seven hundred twenty-one million, three hundred ninety-eight thousand, eight hundred sixty-two".