2239705728 has 384 divisors, whose sum is σ = 7485004800. Its totient is φ = 661893120.

The previous prime is 2239705673. The next prime is 2239705733. The reversal of 2239705728 is 8275079322.

2239705728 is a `hidden beast` number, since 2 + 2 + 3 + 9 + 70 + 572 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11726113 + ... + 11726303.

It is an arithmetic number, because the mean of its divisors is an integer number (19492200).

Almost surely, 2^2239705728 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 2239705728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3742502400).

2239705728 is an abundant number, since it is smaller than the sum of its proper divisors (5245299072).

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

2239705728 is a wasteful number, since it uses less digits than its factorization.

2239705728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 2239705728 is about 47325.5293472772. The cubic root of 2239705728 is about 1308.3692249457.

The spelling of 2239705728 in words is "two billion, two hundred thirty-nine million, seven hundred five thousand, seven hundred twenty-eight".