28737337 has 2 divisors, whose sum is σ = 28737338. Its totient is φ = 28737336.

The previous prime is 28737323. The next prime is 28737353. The reversal of 28737337 is 73373782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28259856 + 477481 = 5316^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 28737337 - 2²³ = 20348729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28737337.

It is not a weakly prime, because it can be changed into another prime (28732337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14368668 + 14368669.

It is an arithmetic number, because the mean of its divisors is an integer number (14368669).

Almost surely, 2^28737337 is an apocalyptic number.

It is an amenable number.

28737337 is a deficient number, since it is larger than the sum of its proper divisors (1).

28737337 is an equidigital number, since it uses as much as digits as its factorization.

28737337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 40.

The square root of 28737337 is about 5360.7216864896. The cubic root of 28737337 is about 306.3013001942.

The spelling of 28737337 in words is "twenty-eight million, seven hundred thirty-seven thousand, three hundred thirty-seven".