28047433 has 8 divisors (see below), whose sum is σ = 29753352. Its totient is φ = 26347776.

The previous prime is 28047431. The next prime is 28047451. The reversal of 28047433 is 33474082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23687689 + 4359744 = 4867^2 + 2088^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28047433 - 2¹ = 28047431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28047395 and 28047404.

It is not an unprimeable number, because it can be changed into a prime (28047431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10291 + ... + 12727.

It is an arithmetic number, because the mean of its divisors is an integer number (3719169).

Almost surely, 2^28047433 is an apocalyptic number.

It is an amenable number.

28047433 is a deficient number, since it is larger than the sum of its proper divisors (1705919).

28047433 is a wasteful number, since it uses less digits than its factorization.

28047433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 28047433 is about 5295.9827227815. The cubic root of 28047433 is about 303.8302701256.

The spelling of 28047433 in words is "twenty-eight million, forty-seven thousand, four hundred thirty-three".