28922229 has 24 divisors (see below), whose sum is σ = 48048000. Its totient is φ = 16422048.

The previous prime is 28922209. The next prime is 28922233. The reversal of 28922229 is 92222982.

It is not a de Polignac number, because 28922229 - 2¹³ = 28914037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28922193 and 28922202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28922209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9147 + ... + 11895.

It is an arithmetic number, because the mean of its divisors is an integer number (2002000).

Almost surely, 2^28922229 is an apocalyptic number.

It is an amenable number.

28922229 is a deficient number, since it is larger than the sum of its proper divisors (19125771).

28922229 is a wasteful number, since it uses less digits than its factorization.

28922229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929 (or 2926 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 28922229 is about 5377.9391034113. The cubic root of 28922229 is about 306.9567962913.

The spelling of 28922229 in words is "twenty-eight million, nine hundred twenty-two thousand, two hundred twenty-nine".