2905728 has 128 divisors (see below), whose sum is σ = 9400320. Its totient is φ = 777216.

The previous prime is 2905703. The next prime is 2905739. The reversal of 2905728 is 8275092.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61801 + ... + 61847.

It is an arithmetic number, because the mean of its divisors is an integer number (73440).

2^2905728 is an apocalyptic number.

2905728 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 2905728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4700160).

2905728 is an abundant number, since it is smaller than the sum of its proper divisors (6494592).

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

2905728 is a wasteful number, since it uses less digits than its factorization.

2905728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 2905728 is about 1704.6196056599. The cubic root of 2905728 is about 142.6981423356.

The spelling of 2905728 in words is "two million, nine hundred five thousand, seven hundred twenty-eight".