28149337 has 2 divisors, whose sum is σ = 28149338. Its totient is φ = 28149336.

The previous prime is 28149281. The next prime is 28149347. The reversal of 28149337 is 73394182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 1565001 = 5156^2 + 1251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28149337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28149296 and 28149305.

It is not a weakly prime, because it can be changed into another prime (28149347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14074668 + 14074669.

It is an arithmetic number, because the mean of its divisors is an integer number (14074669).

Almost surely, 2^28149337 is an apocalyptic number.

It is an amenable number.

28149337 is a deficient number, since it is larger than the sum of its proper divisors (1).

28149337 is an equidigital number, since it uses as much as digits as its factorization.

28149337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 28149337 is about 5305.5948771085. The cubic root of 28149337 is about 304.1977915565.

The spelling of 28149337 in words is "twenty-eight million, one hundred forty-nine thousand, three hundred thirty-seven".