28997333 has 2 divisors, whose sum is σ = 28997334. Its totient is φ = 28997332.

The previous prime is 28997327. The next prime is 28997341. The reversal of 28997333 is 33379982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 9132484 = 4457^2 + 3022^2 .

It is a cyclic number.

It is not a de Polignac number, because 28997333 - 2⁴ = 28997317 is a prime.

It is a super-3 number, since 3×28997333³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28997383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14498666 + 14498667.

It is an arithmetic number, because the mean of its divisors is an integer number (14498667).

Almost surely, 2^28997333 is an apocalyptic number.

It is an amenable number.

28997333 is a deficient number, since it is larger than the sum of its proper divisors (1).

28997333 is an equidigital number, since it uses as much as digits as its factorization.

28997333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 28997333 is about 5384.9171767075. The cubic root of 28997333 is about 307.2222640397. Note that the first 4 decimals are identical.

The spelling of 28997333 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred thirty-three".