33728447 has 2 divisors, whose sum is σ = 33728448. Its totient is φ = 33728446.

The previous prime is 33728413. The next prime is 33728501. The reversal of 33728447 is 74482733.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33728447 - 2¹⁰ = 33727423 is a prime.

It is a super-2 number, since 2×33728447² = 2275216274063618, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33728447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33728047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16864223 + 16864224.

It is an arithmetic number, because the mean of its divisors is an integer number (16864224).

Almost surely, 2^33728447 is an apocalyptic number.

33728447 is a deficient number, since it is larger than the sum of its proper divisors (1).

33728447 is an equidigital number, since it uses as much as digits as its factorization.

33728447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 38.

The square root of 33728447 is about 5807.6197361742. The cubic root of 33728447 is about 323.0963969583.

The spelling of 33728447 in words is "thirty-three million, seven hundred twenty-eight thousand, four hundred forty-seven".