28972033 has 2 divisors, whose sum is σ = 28972034. Its totient is φ = 28972032.

The previous prime is 28972003. The next prime is 28972037. The reversal of 28972033 is 33027982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20866624 + 8105409 = 4568^2 + 2847^2 .

It is a cyclic number.

It is not a de Polignac number, because 28972033 - 2⁵ = 28972001 is a prime.

It is a super-3 number, since 3×28972033³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28972033.

It is not a weakly prime, because it can be changed into another prime (28972037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14486016 + 14486017.

It is an arithmetic number, because the mean of its divisors is an integer number (14486017).

Almost surely, 2^28972033 is an apocalyptic number.

It is an amenable number.

28972033 is a deficient number, since it is larger than the sum of its proper divisors (1).

28972033 is an equidigital number, since it uses as much as digits as its factorization.

28972033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 28972033 is about 5382.5675100272. The cubic root of 28972033 is about 307.1328881773.

The spelling of 28972033 in words is "twenty-eight million, nine hundred seventy-two thousand, thirty-three".