28212333 has 16 divisors (see below), whose sum is σ = 39937536. Its totient is φ = 17653760.

The previous prime is 28212323. The next prime is 28212341. The reversal of 28212333 is 33321282.

It is a cyclic number.

It is not a de Polignac number, because 28212333 - 2⁶ = 28212269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28212323) 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, 32260 + ... + 33122.

It is an arithmetic number, because the mean of its divisors is an integer number (2496096).

Almost surely, 2^28212333 is an apocalyptic number.

It is an amenable number.

28212333 is a deficient number, since it is larger than the sum of its proper divisors (11725203).

28212333 is a wasteful number, since it uses less digits than its factorization.

28212333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524.

The product of its digits is 1728, while the sum is 24.

The square root of 28212333 is about 5311.5283111361. The cubic root of 28212333 is about 304.4245460569.

The spelling of 28212333 in words is "twenty-eight million, two hundred twelve thousand, three hundred thirty-three".