28384733 has 12 divisors (see below), whose sum is σ = 31325940. Its totient is φ = 25698816.

The previous prime is 28384721. The next prime is 28384753. The reversal of 28384733 is 33748382.

It can be written as a sum of positive squares in 6 ways, for example, as 273529 + 28111204 = 523^2 + 5302^2 .

It is not a de Polignac number, because 28384733 - 2²² = 24190429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28384753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7373 + ... + 10541.

It is an arithmetic number, because the mean of its divisors is an integer number (2610495).

Almost surely, 2^28384733 is an apocalyptic number.

It is an amenable number.

28384733 is a deficient number, since it is larger than the sum of its proper divisors (2941207).

28384733 is a wasteful number, since it uses less digits than its factorization.

28384733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248 (or 3235 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The square root of 28384733 is about 5327.7324444833. The cubic root of 28384733 is about 305.0433800163.

The spelling of 28384733 in words is "twenty-eight million, three hundred eighty-four thousand, seven hundred thirty-three".