2787228 has 36 divisors (see below), whose sum is σ = 7108920. Its totient is φ = 920736.

The previous prime is 2787227. The next prime is 2787229. The reversal of 2787228 is 8227872.

2787228 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2787227) and next prime (2787229).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2787192 and 2787201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4726 + ... + 5282.

It is an arithmetic number, because the mean of its divisors is an integer number (197470).

2^2787228 is an apocalyptic number.

It is an amenable number.

2787228 is an abundant number, since it is smaller than the sum of its proper divisors (4321692).

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

2787228 is a wasteful number, since it uses less digits than its factorization.

2787228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 701 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 2787228 is about 1669.4993261454. The cubic root of 2787228 is about 140.7313429688.

The spelling of 2787228 in words is "two million, seven hundred eighty-seven thousand, two hundred twenty-eight".