2775420 has 72 divisors (see below), whose sum is σ = 8923824. Its totient is φ = 695808.

The previous prime is 2775391. The next prime is 2775431. The reversal of 2775420 is 245772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2607 + ... + 3513.

It is an arithmetic number, because the mean of its divisors is an integer number (123942).

2^2775420 is an apocalyptic number.

2775420 is a gapful number since it is divisible by the number (20) 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 2775420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4461912).

2775420 is an abundant number, since it is smaller than the sum of its proper divisors (6148404).

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

2775420 is a wasteful number, since it uses less digits than its factorization.

2775420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 2775420 is about 1665.9591831735. The cubic root of 2775420 is about 140.5323270894.

The spelling of 2775420 in words is "two million, seven hundred seventy-five thousand, four hundred twenty".