28647733 has 2 divisors, whose sum is σ = 28647734. Its totient is φ = 28647732.

The previous prime is 28647727. The next prime is 28647743. The reversal of 28647733 is 33774682.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 3175524 = 5047^2 + 1782^2 .

It is a cyclic number.

It is not a de Polignac number, because 28647733 - 2⁹ = 28647221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28647743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14323866 + 14323867.

It is an arithmetic number, because the mean of its divisors is an integer number (14323867).

Almost surely, 2^28647733 is an apocalyptic number.

It is an amenable number.

28647733 is a deficient number, since it is larger than the sum of its proper divisors (1).

28647733 is an equidigital number, since it uses as much as digits as its factorization.

28647733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The square root of 28647733 is about 5352.3577047877. The cubic root of 28647733 is about 305.9826160970.

The spelling of 28647733 in words is "twenty-eight million, six hundred forty-seven thousand, seven hundred thirty-three".