2821272 has 64 divisors (see below), whose sum is σ = 7776000. Its totient is φ = 849024.

The previous prime is 2821267. The next prime is 2821277. The reversal of 2821272 is 2721282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2821267) and next prime (2821277).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821277) 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, 10354 + ... + 10622.

It is an arithmetic number, because the mean of its divisors is an integer number (121500).

2^2821272 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 2821272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3888000).

2821272 is an abundant number, since it is smaller than the sum of its proper divisors (4954728).

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

2821272 is a wasteful number, since it uses less digits than its factorization.

2821272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 316 counting only the distinct ones).

The product of its digits is 896, while the sum is 24.

The square root of 2821272 is about 1679.6642521647. The cubic root of 2821272 is about 141.3020034586.

The spelling of 2821272 in words is "two million, eight hundred twenty-one thousand, two hundred seventy-two".