2774820 has 48 divisors (see below), whose sum is σ = 7862400. Its totient is φ = 731136.

The previous prime is 2774819. The next prime is 2774843. The reversal of 2774820 is 284772.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 5956 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (163800).

2^2774820 is an apocalyptic number.

2774820 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 2774820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3931200).

2774820 is an abundant number, since it is smaller than the sum of its proper divisors (5087580).

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

2774820 is a wasteful number, since it uses less digits than its factorization.

2774820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 2774820 is about 1665.7790969994. The cubic root of 2774820 is about 140.5221994363.

It can be divided in two parts, 27 and 74820, that added together give a palindrome (74847).

The spelling of 2774820 in words is "two million, seven hundred seventy-four thousand, eight hundred twenty".