2905128 has 48 divisors (see below), whose sum is σ = 7948980. Its totient is φ = 958464.

The previous prime is 2905109. The next prime is 2905139. The reversal of 2905128 is 8215092.

It can be written as a sum of positive squares in 2 ways, for example, as 2762244 + 142884 = 1662^2 + 378^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11176 + ... + 11432.

2^2905128 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 2905128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3974490).

2905128 is an abundant number, since it is smaller than the sum of its proper divisors (5043852).

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

2905128 is a wasteful number, since it uses less digits than its factorization.

2905128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2905128 is about 1704.4436042298. The cubic root of 2905128 is about 142.6883198081.

The spelling of 2905128 in words is "two million, nine hundred five thousand, one hundred twenty-eight".