2660329728 has 432 divisors, whose sum is σ = 9611836416. Its totient is φ = 690094080.

The previous prime is 2660329723. The next prime is 2660329739. The reversal of 2660329728 is 8279230662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660329723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8499300 + ... + 8499612.

Almost surely, 2^2660329728 is an apocalyptic number.

2660329728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2660329728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4805918208).

2660329728 is an abundant number, since it is smaller than the sum of its proper divisors (6951506688).

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

2660329728 is a wasteful number, since it uses less digits than its factorization.

2660329728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 2660329728 is about 51578.3843097087. The cubic root of 2660329728 is about 1385.6232304845.

The spelling of 2660329728 in words is "two billion, six hundred sixty million, three hundred twenty-nine thousand, seven hundred twenty-eight".