2275728 has 80 divisors (see below), whose sum is σ = 7249536. Its totient is φ = 599040.

The previous prime is 2275723. The next prime is 2275733. The reversal of 2275728 is 8275722.

It is an interprime number because it is at equal distance from previous prime (2275723) and next prime (2275733).

It is not an unprimeable number, because it can be changed into a prime (2275723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4108 + ... + 4628.

2^2275728 is an apocalyptic number.

2275728 is a gapful number since it is divisible by the number (28) 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 2275728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3624768).

2275728 is an abundant number, since it is smaller than the sum of its proper divisors (4973808).

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

2275728 is a wasteful number, since it uses less digits than its factorization.

2275728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 546 counting only the distinct ones).

The product of its digits is 15680, while the sum is 33.

The square root of 2275728 is about 1508.5516232466. The cubic root of 2275728 is about 131.5346330827.

It can be divided in two parts, 2275 and 728, that added together give a palindrome (3003).

The spelling of 2275728 in words is "two million, two hundred seventy-five thousand, seven hundred twenty-eight".