28437089 has 2 divisors, whose sum is σ = 28437090. Its totient is φ = 28437088.

The previous prime is 28437049. The next prime is 28437113. The reversal of 28437089 is 98073482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 134689 = 5320^2 + 367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28437089 is a prime.

It is not a weakly prime, because it can be changed into another prime (28437029) 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, 14218544 + 14218545.

It is an arithmetic number, because the mean of its divisors is an integer number (14218545).

Almost surely, 2^28437089 is an apocalyptic number.

It is an amenable number.

28437089 is a deficient number, since it is larger than the sum of its proper divisors (1).

28437089 is an equidigital number, since it uses as much as digits as its factorization.

28437089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28437089 is about 5332.6437158318. The cubic root of 28437089 is about 305.2308169479.

It can be divided in two parts, 284 and 37089, that added together give a palindrome (37373).

The spelling of 28437089 in words is "twenty-eight million, four hundred thirty-seven thousand, eighty-nine".