2755890 has 64 divisors (see below), whose sum is σ = 7516800. Its totient is φ = 718272.

The previous prime is 2755877. The next prime is 2755891. The reversal of 2755890 is 985572.

2755890 is a `hidden beast` number, since 2 + 75 + 589 + 0 = 666.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2755891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15844 + ... + 16016.

It is an arithmetic number, because the mean of its divisors is an integer number (117450).

2^2755890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2755890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3758400).

2755890 is an abundant number, since it is smaller than the sum of its proper divisors (4760910).

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

2755890 is a wasteful number, since it uses less digits than its factorization.

2755890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 2755890 is about 1660.0873470995. The cubic root of 2755890 is about 140.2019195194.

The spelling of 2755890 in words is "two million, seven hundred fifty-five thousand, eight hundred ninety".