28148437 has 2 divisors, whose sum is σ = 28148438. Its totient is φ = 28148436.

The previous prime is 28148423. The next prime is 28148489. The reversal of 28148437 is 73484182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25462116 + 2686321 = 5046^2 + 1639^2 .

It is a cyclic number.

It is not a de Polignac number, because 28148437 - 2¹¹ = 28146389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28148396 and 28148405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28148137) 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, 14074218 + 14074219.

It is an arithmetic number, because the mean of its divisors is an integer number (14074219).

Almost surely, 2^28148437 is an apocalyptic number.

It is an amenable number.

28148437 is a deficient number, since it is larger than the sum of its proper divisors (1).

28148437 is an equidigital number, since it uses as much as digits as its factorization.

28148437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 37.

The square root of 28148437 is about 5305.5100603052. The cubic root of 28148437 is about 304.1945495508.

The spelling of 28148437 in words is "twenty-eight million, one hundred forty-eight thousand, four hundred thirty-seven".