2775828 has 48 divisors (see below), whose sum is σ = 7487424. Its totient is φ = 791040.

The previous prime is 2775781. The next prime is 2775841. The reversal of 2775828 is 8285772.

It is a congruent number.

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, 1626 + ... + 2862.

It is an arithmetic number, because the mean of its divisors is an integer number (155988).

2^2775828 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 2775828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3743712).

2775828 is an abundant number, since it is smaller than the sum of its proper divisors (4711596).

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

2775828 is a wasteful number, since it uses less digits than its factorization.

2775828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1270 counting only the distinct ones).

The product of its digits is 62720, while the sum is 39.

The square root of 2775828 is about 1666.0816306532. The cubic root of 2775828 is about 140.5392130599.

It can be divided in two parts, 277 and 5828, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 2775828 in words is "two million, seven hundred seventy-five thousand, eight hundred twenty-eight".