2891229 has 8 divisors (see below), whose sum is σ = 4205472. Its totient is φ = 1752240.

The previous prime is 2891219. The next prime is 2891233. The reversal of 2891229 is 9221982.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2891229 - 2⁷ = 2891101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 87613 = 2891229 / (2 + 8 + 9 + 1 + 2 + 2 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 2891229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43774 + ... + 43839.

It is an arithmetic number, because the mean of its divisors is an integer number (525684).

2^2891229 is an apocalyptic number.

It is an amenable number.

2891229 is a deficient number, since it is larger than the sum of its proper divisors (1314243).

2891229 is a wasteful number, since it uses less digits than its factorization.

2891229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87627.

The product of its digits is 5184, while the sum is 33.

The square root of 2891229 is about 1700.3614321667. The cubic root of 2891229 is about 142.4604014318.

The spelling of 2891229 in words is "two million, eight hundred ninety-one thousand, two hundred twenty-nine".