28935447 has 4 divisors (see below), whose sum is σ = 38580600. Its totient is φ = 19290296.

The previous prime is 28935437. The next prime is 28935451. The reversal of 28935447 is 74453982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28935447 - 2⁶ = 28935383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28935399 and 28935408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28935407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4822572 + ... + 4822577.

It is an arithmetic number, because the mean of its divisors is an integer number (9645150).

Almost surely, 2^28935447 is an apocalyptic number.

28935447 is a deficient number, since it is larger than the sum of its proper divisors (9645153).

28935447 is an equidigital number, since it uses as much as digits as its factorization.

28935447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9645152.

The product of its digits is 241920, while the sum is 42.

The square root of 28935447 is about 5379.1678724502. The cubic root of 28935447 is about 307.0035508366.

The spelling of 28935447 in words is "twenty-eight million, nine hundred thirty-five thousand, four hundred forty-seven".