28507337 has 2 divisors, whose sum is σ = 28507338. Its totient is φ = 28507336.

The previous prime is 28507331. The next prime is 28507357. The reversal of 28507337 is 73370582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27994681 + 512656 = 5291^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 28507337 - 2⁶ = 28507273 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28507297 and 28507306.

It is not a weakly prime, because it can be changed into another prime (28507331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14253668 + 14253669.

It is an arithmetic number, because the mean of its divisors is an integer number (14253669).

Almost surely, 2^28507337 is an apocalyptic number.

It is an amenable number.

28507337 is a deficient number, since it is larger than the sum of its proper divisors (1).

28507337 is an equidigital number, since it uses as much as digits as its factorization.

28507337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 28507337 is about 5339.2262548051. The cubic root of 28507337 is about 305.4819469976.

The spelling of 28507337 in words is "twenty-eight million, five hundred seven thousand, three hundred thirty-seven".