28894229 has 16 divisors (see below), whose sum is σ = 35817600. Its totient is φ = 22697280.

The previous prime is 28894199. The next prime is 28894241. The reversal of 28894229 is 92249882.

It is a cyclic number.

It is not a de Polignac number, because 28894229 - 2⁸ = 28893973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28894229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28894249) 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, 12494 + ... + 14624.

It is an arithmetic number, because the mean of its divisors is an integer number (2238600).

Almost surely, 2^28894229 is an apocalyptic number.

It is an amenable number.

28894229 is a deficient number, since it is larger than the sum of its proper divisors (6923371).

28894229 is a wasteful number, since it uses less digits than its factorization.

28894229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300.

The product of its digits is 165888, while the sum is 44.

The square root of 28894229 is about 5375.3352453591. The cubic root of 28894229 is about 306.8577079699.

The spelling of 28894229 in words is "twenty-eight million, eight hundred ninety-four thousand, two hundred twenty-nine".